Placeholder Eric Carmichael requested to merge prune-some-todos-2 into develop Feb 05, 2020

@ mention of reviewers`

@jimmykodes`

A brief description of the purpose of the changes contained in this PR.

Removing some TODOs and general clean up

Fixes https://github.com/codalab/competitions-v2/issues/305

A checklist for hand testing

(fairly well covered in tests)

leaderboard submission grabbing works
users/owners/creators attached to the appropriate model on creation of things

Checklist