Revert D27364777: [pytorch][PR] Add annotations to PRs from forks
Test Plan: revert-hammer
Differential Revision:
D27364777 (https://github.com/pytorch/pytorch/commit/56f12e61999887d7d5fbae4f59b8b76bf2ee05a2)
Original commit changeset: a830d372d7bb
fbshipit-source-id: 56d490a4161a78ab28fd7d948b5a13af58efd9d7
