diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/ListMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/ListMR.java
index c7134106be603e1ca0f0819bbc086b28e79a7ad3..8110560bfac52c394462ba63cd59e850d0dc5aa3 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/ListMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/ListMR.java
@@ -44,7 +44,6 @@ import com.oracle.truffle.r.nodes.access.vector.ExtractVectorNode;
 import com.oracle.truffle.r.nodes.access.vector.ReplaceVectorNode;
 import com.oracle.truffle.r.nodes.attributes.SpecialAttributesFunctions.GetNamesAttributeNode;
 import com.oracle.truffle.r.nodes.control.RLengthNode;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RDataFactory;
 import com.oracle.truffle.r.runtime.data.RExpression;
 import com.oracle.truffle.r.runtime.data.RFunction;
@@ -54,7 +53,6 @@ import com.oracle.truffle.r.runtime.data.RMissing;
 import com.oracle.truffle.r.runtime.data.RObject;
 import com.oracle.truffle.r.runtime.data.RPairList;
 import com.oracle.truffle.r.runtime.data.RStringVector;
-import com.oracle.truffle.r.runtime.data.RTruffleObject;
 import com.oracle.truffle.r.runtime.interop.Foreign2R;
 import com.oracle.truffle.r.runtime.interop.Foreign2RNodeGen;
 import com.oracle.truffle.r.runtime.interop.R2Foreign;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RAbstractVectorAccessFactory.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RAbstractVectorAccessFactory.java
index d93ad5d947fc62bad0f6942300cbc60ae0a89467..71f967bff098ada7715caa6243e63e75a9ebe3b9 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RAbstractVectorAccessFactory.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RAbstractVectorAccessFactory.java
@@ -53,7 +53,6 @@ import com.oracle.truffle.r.nodes.access.vector.ReplaceVectorNode;
 import com.oracle.truffle.r.nodes.access.vector.ReplaceVectorNodeGen;
 import com.oracle.truffle.r.nodes.control.RLengthNode;
 import com.oracle.truffle.r.runtime.RRuntime;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RLogical;
 import com.oracle.truffle.r.runtime.data.RObject;
 import com.oracle.truffle.r.runtime.data.RRaw;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RArgsValuesAndNamesMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RArgsValuesAndNamesMR.java
index 63ff4f7cfab9713f51a1b2fa80edcd3442139f1c..41d74de381bcf61c03a5c62e0c39dd70db9be2e3 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RArgsValuesAndNamesMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RArgsValuesAndNamesMR.java
@@ -36,7 +36,6 @@ import com.oracle.truffle.api.profiles.ConditionProfile;
 import com.oracle.truffle.r.engine.interop.RArgsValuesAndNamesMRFactory.RArgsValuesAndNamesKeyInfoImplNodeGen;
 import com.oracle.truffle.r.engine.interop.RArgsValuesAndNamesMRFactory.RArgsValuesAndNamesReadImplNodeGen;
 import com.oracle.truffle.r.runtime.ArgumentsSignature;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RArgsValuesAndNames;
 import com.oracle.truffle.r.runtime.data.RDataFactory;
 import com.oracle.truffle.r.runtime.data.RFunction;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RConnectionMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RConnectionMR.java
index eb2e28eba0a58eebc18169a15b6a9ca07036fb43..230dff20b70da4a6b417d78bfa41d63f0a4c92ba 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RConnectionMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RConnectionMR.java
@@ -28,7 +28,6 @@ import com.oracle.truffle.api.interop.Resolve;
 import com.oracle.truffle.api.interop.TruffleObject;
 import com.oracle.truffle.api.nodes.Node;
 import com.oracle.truffle.r.runtime.conn.RConnection;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RObject;
 import com.oracle.truffle.r.runtime.interop.RObjectNativeWrapper;
 
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/REmptyMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/REmptyMR.java
index 69cf785f0d99dd8718f7946b021591b307b179be..743598973de34145f9cdc88b9c345b985ff7547a 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/REmptyMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/REmptyMR.java
@@ -27,7 +27,6 @@ import com.oracle.truffle.api.interop.MessageResolution;
 import com.oracle.truffle.api.interop.Resolve;
 import com.oracle.truffle.api.interop.TruffleObject;
 import com.oracle.truffle.api.nodes.Node;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.REmpty;
 import com.oracle.truffle.r.runtime.data.RObject;
 import com.oracle.truffle.r.runtime.interop.RObjectNativeWrapper;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/REnvironmentMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/REnvironmentMR.java
index cd81b31eeccfdaee3be0248bf411ce9af83afc65..31246b547d4d2212875d1cba32709e9e2974ddd8 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/REnvironmentMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/REnvironmentMR.java
@@ -44,7 +44,6 @@ import com.oracle.truffle.r.engine.interop.REnvironmentMRFactory.REnvironmentWri
 import com.oracle.truffle.r.nodes.access.vector.ElementAccessMode;
 import com.oracle.truffle.r.nodes.access.vector.ExtractVectorNode;
 import com.oracle.truffle.r.nodes.access.vector.ReplaceVectorNode;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RFunction;
 import com.oracle.truffle.r.runtime.data.RObject;
 import com.oracle.truffle.r.runtime.env.REnvironment;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RForeignAccessFactoryImpl.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RForeignAccessFactoryImpl.java
index b90ce24ede1dd358a646f875f88a945e3e377be6..5cc71153290f4230e7118ae6ebe403a3e3af911a 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RForeignAccessFactoryImpl.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RForeignAccessFactoryImpl.java
@@ -28,7 +28,6 @@ import com.oracle.truffle.api.interop.MessageResolution;
 import com.oracle.truffle.r.ffi.impl.interop.FFI_RForeignAccessFactoryImpl;
 import com.oracle.truffle.r.runtime.RInternalError;
 import com.oracle.truffle.r.runtime.conn.RConnection;
-import com.oracle.truffle.r.runtime.context.RContext;
 import com.oracle.truffle.r.runtime.context.RForeignAccessFactory;
 import com.oracle.truffle.r.runtime.data.RArgsValuesAndNames;
 import com.oracle.truffle.r.runtime.data.RComplex;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RFunctionMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RFunctionMR.java
index 509fef6826f6240c1fc6e1b4bab2739f50ccf794..36d76a99b6ab6f3d8863990a4bbf7d7e9b4c3ebd 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RFunctionMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RFunctionMR.java
@@ -36,7 +36,6 @@ import com.oracle.truffle.r.nodes.function.RCallBaseNode;
 import com.oracle.truffle.r.nodes.function.RCallNode;
 import com.oracle.truffle.r.runtime.ArgumentsSignature;
 import com.oracle.truffle.r.runtime.RArguments;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RArgsValuesAndNames;
 import com.oracle.truffle.r.runtime.data.RFunction;
 import com.oracle.truffle.r.runtime.data.RObject;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RLanguageMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RLanguageMR.java
index c05941b896d7487427999103b4a78f5f40b92f82..5861a235f3f7bbd3fd09d4d03f0a6204d9238524 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RLanguageMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RLanguageMR.java
@@ -37,7 +37,6 @@ import com.oracle.truffle.api.nodes.Node;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 import com.oracle.truffle.r.nodes.access.vector.ElementAccessMode;
 import com.oracle.truffle.r.nodes.access.vector.ExtractVectorNode;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RLanguage;
 import com.oracle.truffle.r.runtime.data.RLogical;
 import com.oracle.truffle.r.runtime.data.RNull;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RMissingMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RMissingMR.java
index bc802da515f67c204a1d3fb319da146147e9d9f2..9190d0057c79c6b4aad37ce781a9a0d1c17cca9a 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RMissingMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RMissingMR.java
@@ -27,9 +27,7 @@ import com.oracle.truffle.api.interop.MessageResolution;
 import com.oracle.truffle.api.interop.Resolve;
 import com.oracle.truffle.api.interop.TruffleObject;
 import com.oracle.truffle.api.nodes.Node;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RMissing;
-import com.oracle.truffle.r.runtime.data.RUnboundValue;
 import com.oracle.truffle.r.runtime.interop.RObjectNativeWrapper;
 
 @MessageResolution(receiverType = RMissing.class)
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RNullMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RNullMR.java
index 611a2532fd803b7db277c2dd46b50bc00b7b073f..d8522ba773cd3c17651ed7ede84c26e3ca0aa60b 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RNullMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RNullMR.java
@@ -29,7 +29,6 @@ import com.oracle.truffle.api.interop.TruffleObject;
 import com.oracle.truffle.api.nodes.Node;
 import com.oracle.truffle.r.ffi.impl.interop.NativePointer;
 import com.oracle.truffle.r.runtime.context.RContext;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RNull;
 import com.oracle.truffle.r.runtime.interop.RNullMRContextState;
 import com.oracle.truffle.r.runtime.interop.RObjectNativeWrapper;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RPromiseMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RPromiseMR.java
index 5418eefaaeb8b176e0a8f91aed53424b820407cc..07fa19481efe5bd0ae7cd5977d436cb271a25ae3 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RPromiseMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RPromiseMR.java
@@ -38,7 +38,6 @@ import com.oracle.truffle.r.engine.interop.RPromiseMRFactory.RPromiseReadImplNod
 import com.oracle.truffle.r.engine.interop.RPromiseMRFactory.RPromiseWriteImplNodeGen;
 import com.oracle.truffle.r.nodes.function.PromiseHelperNode;
 import com.oracle.truffle.r.runtime.RRuntime;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RDataFactory;
 import com.oracle.truffle.r.runtime.data.RNull;
 import com.oracle.truffle.r.runtime.data.RObject;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RS4ObjectMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RS4ObjectMR.java
index 4c47887fb273c9c9d734a44684cd88b8837cfd2a..ff7122e0faae9b8585bc6caff38f9e84561ca89e 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RS4ObjectMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RS4ObjectMR.java
@@ -44,7 +44,6 @@ import com.oracle.truffle.r.nodes.attributes.ArrayAttributeNode;
 import com.oracle.truffle.r.nodes.attributes.GetAttributeNode;
 import com.oracle.truffle.r.nodes.attributes.SetAttributeNode;
 import com.oracle.truffle.r.runtime.data.RAttributesLayout.RAttribute;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RDataFactory;
 import com.oracle.truffle.r.runtime.data.RFunction;
 import com.oracle.truffle.r.runtime.data.RNull;
diff --git a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RSymbolMR.java b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RSymbolMR.java
index bc48d623e338b38f8c52bbe441d1ef9b97c3f23a..88a56666652543489b7347afa3a588aede837964 100644
--- a/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RSymbolMR.java
+++ b/com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/interop/RSymbolMR.java
@@ -27,7 +27,6 @@ import com.oracle.truffle.api.interop.MessageResolution;
 import com.oracle.truffle.api.interop.Resolve;
 import com.oracle.truffle.api.interop.TruffleObject;
 import com.oracle.truffle.api.nodes.Node;
-import com.oracle.truffle.r.runtime.data.NativeDataAccess;
 import com.oracle.truffle.r.runtime.data.RObject;
 import com.oracle.truffle.r.runtime.data.RSymbol;
 import com.oracle.truffle.r.runtime.interop.RObjectNativeWrapper;
diff --git a/com.oracle.truffle.r.ffi.impl/src/com/oracle/truffle/r/ffi/impl/common/JavaUpCallsRFFIImpl.java b/com.oracle.truffle.r.ffi.impl/src/com/oracle/truffle/r/ffi/impl/common/JavaUpCallsRFFIImpl.java
index 5b8a625813c475f30702efe04037593f72db6eb6..6f96dfae9a811e10c15b5cbc3b0b668ac538577b 100644
--- a/com.oracle.truffle.r.ffi.impl/src/com/oracle/truffle/r/ffi/impl/common/JavaUpCallsRFFIImpl.java
+++ b/com.oracle.truffle.r.ffi.impl/src/com/oracle/truffle/r/ffi/impl/common/JavaUpCallsRFFIImpl.java
@@ -33,8 +33,6 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.IdentityHashMap;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Function;
 
diff --git a/com.oracle.truffle.r.library/src/com/oracle/truffle/r/library/fastrGrid/ViewPort.java b/com.oracle.truffle.r.library/src/com/oracle/truffle/r/library/fastrGrid/ViewPort.java
index d8e12cf294390d3b5ec24af198a46244a1732635..dd44d6624b34900008de73feea392bca125e2a07 100644
--- a/com.oracle.truffle.r.library/src/com/oracle/truffle/r/library/fastrGrid/ViewPort.java
+++ b/com.oracle.truffle.r.library/src/com/oracle/truffle/r/library/fastrGrid/ViewPort.java
@@ -18,7 +18,6 @@ import static com.oracle.truffle.r.library.fastrGrid.Unit.inchesToCm;
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.nodes.Node;
 import com.oracle.truffle.r.library.fastrGrid.device.GridDevice;
-import com.oracle.truffle.r.library.fastrGrid.device.awt.JFrameDevice;
 import com.oracle.truffle.r.nodes.access.variables.ReadVariableNode;
 import com.oracle.truffle.r.nodes.function.call.RExplicitCallNode;
 import com.oracle.truffle.r.runtime.RRuntime;
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/EagerResourceHandlerFactory.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/EagerResourceHandlerFactory.java
index 039455b5ba9d9b3f5ea6971b8594bcbe0cf9a8cb..8ad12cdf5f51350460004a67fe29b3cd577e69f5 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/EagerResourceHandlerFactory.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/EagerResourceHandlerFactory.java
@@ -24,11 +24,8 @@ package com.oracle.truffle.r.nodes.builtin;
 
 import java.io.ByteArrayInputStream;
 import java.io.File;
-import java.io.IOException;
 import java.io.InputStream;
-import java.net.MalformedURLException;
 import java.net.URL;
-import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.security.CodeSource;
 import java.util.Enumeration;
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Attr.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Attr.java
index 91bee330a3a6e17552221c7aab28aec849c13a9e..be5061a268fa9bbfd1d1560566e0a00e9d0b897c 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Attr.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Attr.java
@@ -29,15 +29,12 @@ import static com.oracle.truffle.r.runtime.builtins.RBehavior.PURE;
 import static com.oracle.truffle.r.runtime.builtins.RBuiltinKind.PRIMITIVE;
 
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
-import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.Fallback;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.object.DynamicObject;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 import com.oracle.truffle.r.nodes.attributes.GetAttributeNode;
-import com.oracle.truffle.r.nodes.attributes.GetAttributesNode;
 import com.oracle.truffle.r.nodes.attributes.IterableAttributeNode;
-import com.oracle.truffle.r.nodes.attributes.SpecialAttributesFunctions.GetRowNamesAttributeNode;
 import com.oracle.truffle.r.nodes.builtin.RBuiltinNode;
 import com.oracle.truffle.r.nodes.builtin.base.UpdateAttr.InternStringNode;
 import com.oracle.truffle.r.nodes.builtin.base.UpdateAttrNodeGen.InternStringNodeGen;
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Combine.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Combine.java
index 874f8e320fef45f3adb59da7f008c49b2a4d5e44..fcfc475523f28c9fc75c8c8235a82d79b4f1a594 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Combine.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Combine.java
@@ -61,7 +61,6 @@ import com.oracle.truffle.r.nodes.unary.CastLogicalNodeGen;
 import com.oracle.truffle.r.nodes.unary.CastNode;
 import com.oracle.truffle.r.nodes.unary.CastRawNodeGen;
 import com.oracle.truffle.r.nodes.unary.CastStringNodeGen;
-import com.oracle.truffle.r.nodes.unary.CastToVectorNode;
 import com.oracle.truffle.r.nodes.unary.PrecedenceNode;
 import com.oracle.truffle.r.nodes.unary.PrecedenceNodeGen;
 import com.oracle.truffle.r.runtime.ArgumentsSignature;
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/CumProd.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/CumProd.java
index a54fc11fc16cca93fd804c4f7786395fdfb300bf..b1773383ace383b9da820c0eb4fa472db6b2307b 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/CumProd.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/CumProd.java
@@ -31,8 +31,6 @@ import com.oracle.truffle.r.runtime.data.RComplexVector;
 import com.oracle.truffle.r.runtime.data.RDataFactory;
 import com.oracle.truffle.r.runtime.data.RDoubleVector;
 import com.oracle.truffle.r.runtime.data.RNull;
-import com.oracle.truffle.r.runtime.data.RShareable;
-import com.oracle.truffle.r.runtime.data.RStringVector;
 import com.oracle.truffle.r.runtime.data.model.RAbstractComplexVector;
 import com.oracle.truffle.r.runtime.data.model.RAbstractDoubleVector;
 import com.oracle.truffle.r.runtime.data.nodes.VectorAccess;
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/CumSum.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/CumSum.java
index 649244b6678a969e8a25d511ec4e97c5531d95e5..5c67e13f087024c11da55a3fda4b9fa1c89c2316 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/CumSum.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/CumSum.java
@@ -49,8 +49,6 @@ import com.oracle.truffle.r.runtime.data.RDataFactory;
 import com.oracle.truffle.r.runtime.data.RDoubleVector;
 import com.oracle.truffle.r.runtime.data.RIntVector;
 import com.oracle.truffle.r.runtime.data.RNull;
-import com.oracle.truffle.r.runtime.data.RShareable;
-import com.oracle.truffle.r.runtime.data.RStringVector;
 import com.oracle.truffle.r.runtime.data.model.RAbstractComplexVector;
 import com.oracle.truffle.r.runtime.data.model.RAbstractDoubleVector;
 import com.oracle.truffle.r.runtime.data.model.RAbstractIntVector;
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/FormatInfo.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/FormatInfo.java
index 2599ec78c37b570c9e890707f656aa783c68582d..d416e8e0b589882e70560a6688647a1f9d90db31 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/FormatInfo.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/FormatInfo.java
@@ -46,7 +46,6 @@ import com.oracle.truffle.r.runtime.data.model.RAbstractVector;
 import com.oracle.truffle.r.runtime.data.nodes.VectorAccess;
 import com.oracle.truffle.r.runtime.data.nodes.VectorAccess.RandomIterator;
 import com.oracle.truffle.r.runtime.data.nodes.VectorAccess.SequentialIterator;
-import com.oracle.truffle.r.runtime.ops.na.NACheck;
 
 /**
  * Information is returned on how format() would be formatted.
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Substr.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Substr.java
index 4ccb4cf1405efbffba52c7e47750f4ba0011ba3b..a10e3cdb69af2d5281f489aee955dc81b73245e8 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Substr.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/Substr.java
@@ -27,7 +27,6 @@ import static com.oracle.truffle.r.runtime.builtins.RBehavior.PURE;
 import static com.oracle.truffle.r.runtime.builtins.RBuiltinKind.INTERNAL;
 
 import com.oracle.truffle.api.dsl.Specialization;
-import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.profiles.BranchProfile;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 import com.oracle.truffle.r.nodes.attributes.UnaryCopyAttributesNode;
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/fastr/FastROptionBuiltin.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/fastr/FastROptionBuiltin.java
index a5b8a799baf880c2f5445a08ed02b72c11af395b..59ff4cc66adb00debe2773a885c42a1146185de2 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/fastr/FastROptionBuiltin.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/fastr/FastROptionBuiltin.java
@@ -22,7 +22,6 @@
  */
 package com.oracle.truffle.r.nodes.builtin.fastr;
 
-import static com.oracle.truffle.r.runtime.RVisibility.OFF;
 import static com.oracle.truffle.r.runtime.RVisibility.ON;
 import static com.oracle.truffle.r.runtime.builtins.RBehavior.COMPLEX;
 import static com.oracle.truffle.r.runtime.builtins.RBuiltinKind.PRIMITIVE;
@@ -33,9 +32,7 @@ import com.oracle.truffle.r.nodes.builtin.RBuiltinNode;
 import com.oracle.truffle.r.runtime.FastROptions;
 import com.oracle.truffle.r.runtime.RRuntime;
 import com.oracle.truffle.r.runtime.builtins.RBuiltin;
-import com.oracle.truffle.r.runtime.data.RMissing;
 import com.oracle.truffle.r.runtime.data.RNull;
-import com.oracle.truffle.r.runtime.data.model.RAbstractStringVector;
 
 /**
  * Allows to read {@link FastROptions} from (e.g. internal) R code.
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/helpers/DebugHandling.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/helpers/DebugHandling.java
index 499760e739d7ab87e8ef483aeccb2a2c71aa6ab7..c2afef337e52e261f15d45a30e06d5443a8a2c44 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/helpers/DebugHandling.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/helpers/DebugHandling.java
@@ -46,7 +46,6 @@ import com.oracle.truffle.r.nodes.control.AbstractLoopNode;
 import com.oracle.truffle.r.nodes.function.FunctionDefinitionNode;
 import com.oracle.truffle.r.nodes.instrumentation.RInstrumentation;
 import com.oracle.truffle.r.nodes.instrumentation.RSyntaxTags;
-import com.oracle.truffle.r.nodes.instrumentation.RSyntaxTags.LoopTag;
 import com.oracle.truffle.r.runtime.JumpToTopLevelException;
 import com.oracle.truffle.r.runtime.RArguments;
 import com.oracle.truffle.r.runtime.RDeparse;
diff --git a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/ChimneySweeping.java b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/ChimneySweeping.java
index 0179868d91a1ebf293df0ddab6135e13c1e7d944..99f7d234a8448387fc3c89fc99b9f396681ea7bf 100644
--- a/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/ChimneySweeping.java
+++ b/com.oracle.truffle.r.nodes.test/src/com/oracle/truffle/r/nodes/test/ChimneySweeping.java
@@ -63,7 +63,6 @@ import com.oracle.truffle.r.test.generate.TestOutputManager;
 import com.oracle.truffle.r.test.generate.TestOutputManager.TestInfo;
 import org.graalvm.polyglot.Context;
 import org.graalvm.polyglot.Value;
-import org.graalvm.polyglot.proxy.ProxyExecutable;
 import static org.junit.Assert.fail;
 import static com.oracle.truffle.r.test.generate.FastRSession.execInContext;
 
diff --git a/com.oracle.truffle.r.nodes/src/com/oracle/truffle/r/nodes/access/vector/PositionCastNode.java b/com.oracle.truffle.r.nodes/src/com/oracle/truffle/r/nodes/access/vector/PositionCastNode.java
index da1209899414caafc038cfb733b68ba8dbcd0867..4d9465f28182345b23b0d9692a27996d8f740ada 100644
--- a/com.oracle.truffle.r.nodes/src/com/oracle/truffle/r/nodes/access/vector/PositionCastNode.java
+++ b/com.oracle.truffle.r.nodes/src/com/oracle/truffle/r/nodes/access/vector/PositionCastNode.java
@@ -33,26 +33,18 @@ import com.oracle.truffle.r.runtime.RType;
 import com.oracle.truffle.r.runtime.data.RDataFactory;
 import com.oracle.truffle.r.runtime.data.RDouble;
 import com.oracle.truffle.r.runtime.data.REmpty;
-import com.oracle.truffle.r.runtime.data.RFunction;
 import com.oracle.truffle.r.runtime.data.RInteger;
 import com.oracle.truffle.r.runtime.data.RLogical;
 import com.oracle.truffle.r.runtime.data.RMissing;
 import com.oracle.truffle.r.runtime.data.RNull;
-import com.oracle.truffle.r.runtime.data.RObject;
-import com.oracle.truffle.r.runtime.data.RS4Object;
 import com.oracle.truffle.r.runtime.data.RString;
 import com.oracle.truffle.r.runtime.data.RSymbol;
 import com.oracle.truffle.r.runtime.data.RTypedValue;
-import com.oracle.truffle.r.runtime.data.model.RAbstractComplexVector;
-import com.oracle.truffle.r.runtime.data.model.RAbstractContainer;
 import com.oracle.truffle.r.runtime.data.model.RAbstractDoubleVector;
 import com.oracle.truffle.r.runtime.data.model.RAbstractIntVector;
-import com.oracle.truffle.r.runtime.data.model.RAbstractListVector;
 import com.oracle.truffle.r.runtime.data.model.RAbstractLogicalVector;
-import com.oracle.truffle.r.runtime.data.model.RAbstractRawVector;
 import com.oracle.truffle.r.runtime.data.model.RAbstractStringVector;
 import com.oracle.truffle.r.runtime.data.model.RAbstractVector;
-import com.oracle.truffle.r.runtime.env.REnvironment;
 import com.oracle.truffle.r.runtime.nodes.RBaseNode;
 import com.oracle.truffle.r.runtime.ops.na.NACheck;
 
diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/RDeparse.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/RDeparse.java
index 8dcaee7c02ff845e3eb88342a1fc32d6bba5a213..51628b9c63b3d6369158a39f84c30bd7d1483399 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/RDeparse.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/RDeparse.java
@@ -29,10 +29,7 @@ import java.util.HashSet;
 import java.util.Iterator;
 
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
-import com.oracle.truffle.api.interop.ForeignAccess;
-import com.oracle.truffle.api.interop.Message;
 import com.oracle.truffle.api.interop.TruffleObject;
-import com.oracle.truffle.api.interop.UnsupportedMessageException;
 import com.oracle.truffle.api.nodes.RootNode;
 import com.oracle.truffle.api.object.DynamicObject;
 import com.oracle.truffle.api.source.Source;
diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/context/Engine.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/context/Engine.java
index 09f8701b21068a6dd2817fba6556f580909bb114..1199cf81f97e4ac29abd7e8c2025df05556ac486 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/context/Engine.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/context/Engine.java
@@ -30,7 +30,6 @@ import com.oracle.truffle.api.CallTarget;
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
 import com.oracle.truffle.api.RootCallTarget;
 import com.oracle.truffle.api.TruffleException;
-import com.oracle.truffle.api.frame.FrameDescriptor;
 import com.oracle.truffle.api.frame.MaterializedFrame;
 import com.oracle.truffle.api.nodes.ExecutableNode;
 import com.oracle.truffle.api.nodes.Node;
diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RSymbol.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RSymbol.java
index 578551775506ea54418e40c37a262316d1f40883..185a8ae2f5adfcf56e8339b671c7c07ddac6a5a1 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RSymbol.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RSymbol.java
@@ -22,12 +22,7 @@
  */
 package com.oracle.truffle.r.runtime.data;
 
-import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
-import java.util.function.Function;
-
-import com.oracle.truffle.api.CompilerAsserts;
-import com.oracle.truffle.api.CompilerDirectives;
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
 import com.oracle.truffle.api.CompilerDirectives.ValueType;
 import com.oracle.truffle.r.runtime.RType;
diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/FastPathVectorAccess.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/FastPathVectorAccess.java
index aacb25a85f18e33758065ad68185ab0913a8f9c9..9a32934bac2338403242fe27e838bf51a76f3132 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/FastPathVectorAccess.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/FastPathVectorAccess.java
@@ -22,7 +22,6 @@
  */
 package com.oracle.truffle.r.runtime.data.nodes;
 
-import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
 import com.oracle.truffle.api.profiles.BranchProfile;
 import com.oracle.truffle.r.runtime.RError;
 import com.oracle.truffle.r.runtime.RError.Message;
diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/SlowPathVectorAccess.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/SlowPathVectorAccess.java
index 47b915f3314cf328be13d6a643a54bd827938b34..03a5a5e833953559a05bac11942affd2c7c07f2f 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/SlowPathVectorAccess.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/SlowPathVectorAccess.java
@@ -22,8 +22,6 @@
  */
 package com.oracle.truffle.r.runtime.data.nodes;
 
-import com.oracle.truffle.api.CompilerAsserts;
-import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
 import com.oracle.truffle.api.profiles.BranchProfile;
 import com.oracle.truffle.r.runtime.RError;
 import com.oracle.truffle.r.runtime.RError.Message;
diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/VectorDataReuse.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/VectorDataReuse.java
index 158bc893ba50bbe8c9c7b3b4a8c5cf0267bfe496..009a7b7f92263702ee66112a47a37ad41912de8a 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/VectorDataReuse.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/nodes/VectorDataReuse.java
@@ -27,7 +27,6 @@
  */
 package com.oracle.truffle.r.runtime.data.nodes;
 
-import com.oracle.truffle.api.dsl.Fallback;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.nodes.Node;
 import com.oracle.truffle.r.runtime.RInternalError;
diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/interop/Foreign2R.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/interop/Foreign2R.java
index 04b9b228439eb1db56ffc94da33901d6443b68ce..304b57c70dbcf7ff2ca83d4e693937461525e4cd 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/interop/Foreign2R.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/interop/Foreign2R.java
@@ -34,7 +34,6 @@ import com.oracle.truffle.r.runtime.RInternalError;
 import com.oracle.truffle.api.nodes.Node;
 import com.oracle.truffle.r.runtime.RRuntime;
 import com.oracle.truffle.r.runtime.data.RNull;
-import com.oracle.truffle.r.runtime.data.RRaw;
 import com.oracle.truffle.r.runtime.nodes.RBaseNode;
 
 @ImportStatic({RRuntime.class})
diff --git a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/ListMRTest.java b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/ListMRTest.java
index df118c0cc495de40ced9fb1414fe8f7836d11258..fa4893330d078656cb9cba1f07c66baf7d0bd45b 100644
--- a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/ListMRTest.java
+++ b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/ListMRTest.java
@@ -36,7 +36,6 @@ import com.oracle.truffle.api.interop.TruffleObject;
 import com.oracle.truffle.api.interop.UnknownIdentifierException;
 import com.oracle.truffle.api.interop.UnsupportedMessageException;
 import com.oracle.truffle.api.interop.UnsupportedTypeException;
-import com.oracle.truffle.api.interop.java.JavaInterop;
 import com.oracle.truffle.r.runtime.data.RList;
 import com.oracle.truffle.r.runtime.data.RNull;
 import com.oracle.truffle.r.runtime.data.RPairList;
diff --git a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/REnvironmentMRTest.java b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/REnvironmentMRTest.java
index 7825675bb4a2d80a9a2b2271d5e083aa5b5a98f8..6c55cf3c64e699cd8112d8c844a23c29c1ec1098 100644
--- a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/REnvironmentMRTest.java
+++ b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/REnvironmentMRTest.java
@@ -34,7 +34,6 @@ import com.oracle.truffle.api.interop.Message;
 import com.oracle.truffle.api.interop.TruffleObject;
 import com.oracle.truffle.api.interop.UnknownIdentifierException;
 import com.oracle.truffle.api.interop.UnsupportedMessageException;
-import com.oracle.truffle.api.interop.java.JavaInterop;
 import com.oracle.truffle.r.runtime.env.REnvironment;
 import com.oracle.truffle.r.test.generate.FastRSession;
 import org.graalvm.polyglot.Source;
diff --git a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/VectorMRTest.java b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/VectorMRTest.java
index f67990c8f30fcbb8a33fa261cac5b15535eafafb..697cdeb547ea7913d619d8b228a027faaa2be8f1 100644
--- a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/VectorMRTest.java
+++ b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/engine/interop/VectorMRTest.java
@@ -25,7 +25,6 @@ package com.oracle.truffle.r.test.engine.interop;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import org.junit.Before;
 import org.junit.Test;
 
 import com.oracle.truffle.api.interop.ForeignAccess;
@@ -34,13 +33,8 @@ import com.oracle.truffle.api.interop.Message;
 import com.oracle.truffle.api.interop.TruffleObject;
 import com.oracle.truffle.api.interop.UnknownIdentifierException;
 import com.oracle.truffle.api.interop.UnsupportedMessageException;
-import com.oracle.truffle.api.interop.java.JavaInterop;
 import com.oracle.truffle.r.runtime.data.RDataFactory;
-import com.oracle.truffle.r.runtime.data.RIntVector;
 import com.oracle.truffle.r.runtime.data.RObject;
-import com.oracle.truffle.r.runtime.data.RStringVector;
-import com.oracle.truffle.r.runtime.data.model.RAbstractIntVector;
-import com.oracle.truffle.r.runtime.data.model.RAbstractStringVector;
 import com.oracle.truffle.r.runtime.data.model.RAbstractVector;
 import static org.junit.Assert.assertEquals;
 
diff --git a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/generate/FastRSession.java b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/generate/FastRSession.java
index 50fa13dc7287e9c3e3346218406851846b1f803b..22ac16e2b772ab22f228d0ddc4a8d5e8f5ffd63b 100644
--- a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/generate/FastRSession.java
+++ b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/generate/FastRSession.java
@@ -52,7 +52,6 @@ import com.oracle.truffle.r.runtime.context.Engine.ParseException;
 import com.oracle.truffle.r.runtime.context.RContext;
 import com.oracle.truffle.r.runtime.context.RContext.ContextKind;
 import com.oracle.truffle.r.test.TestBase;
-import com.oracle.truffle.r.test.engine.interop.AbstractMRTest;
 import com.oracle.truffle.r.test.engine.interop.VectorMRTest;
 import java.io.IOException;
 import java.lang.reflect.AccessibleObject;
diff --git a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/library/utils/TestInteractiveDebug.java b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/library/utils/TestInteractiveDebug.java
index 44dbdb2ee49c5a3be6c433579657415f8eb5eb8a..6f94e4071b72db88881ce0c0c731b3c001b5396a 100644
--- a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/library/utils/TestInteractiveDebug.java
+++ b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/library/utils/TestInteractiveDebug.java
@@ -32,9 +32,6 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 
 import com.oracle.truffle.r.test.TestBase;
-import com.oracle.truffle.r.test.generate.FastRSession;
-import org.graalvm.polyglot.Value;
-import org.graalvm.polyglot.proxy.ProxyExecutable;
 import org.junit.After;
 import static com.oracle.truffle.r.test.generate.FastRSession.execInContext;
 
diff --git a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/runtime/data/RPairListTests.java b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/runtime/data/RPairListTests.java
index 0078010f55d99566a4efd72366ecf49df6a8b2bc..861dec04b5d25bb4f7523660240b0b836cf0ac6a 100644
--- a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/runtime/data/RPairListTests.java
+++ b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/runtime/data/RPairListTests.java
@@ -34,7 +34,6 @@ import com.oracle.truffle.r.runtime.data.RDataFactory;
 import com.oracle.truffle.r.runtime.data.RList;
 import com.oracle.truffle.r.runtime.data.RNull;
 import com.oracle.truffle.r.runtime.data.RPairList;
-import com.oracle.truffle.r.runtime.data.RSharingAttributeStorage;
 
 public class RPairListTests {
     @Test
diff --git a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/tck/FastRDebugTest.java b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/tck/FastRDebugTest.java
index 83c83db57eb45e3803213c63aba6e065a35296fc..00e515d31f38a6905516bed94d2d79e31c60714b 100644
--- a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/tck/FastRDebugTest.java
+++ b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/tck/FastRDebugTest.java
@@ -30,7 +30,6 @@ import static org.junit.Assert.assertTrue;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;