deleted useless extern int luatex_md5_lua_open(lua_State * L) (thanks to A. Kakuto)

source/texk/web2c/luatexdir/lua/luatex-api.h

@@ -85,7 +85,6 @@ extern int luaopen_zip(lua_State * L);
 extern int luaopen_lfs(lua_State * L);
 extern int luaopen_lpeg(lua_State * L);
 extern int luaopen_md5(lua_State * L);
-extern int luatex_md5_lua_open(lua_State * L);
 
 #ifndef LuajitTeX
  extern int luaopen_ffi(lua_State * L);