Summary:
We had accumulated lots of unused dependendencies, and had several test_deps in deps instead. Clean this all up to reduce build times and speed up autocargo processing.
Net removal is of around 500 unneeded dependency lines, which represented false dependencies; by removing them, we should get more parallelism in dev builds, and less overbuilding in CI.
Reviewed By: krallin, StanislavGlebik
Differential Revision: D20999762
fbshipit-source-id: 4db3772cbc3fb2af09a16601bc075ae8ed6f0c75