Revert D25958987: [pytorch][PR] Add type annotations to torch.overrides
Test Plan: revert-hammer
Differential Revision:
D25958987 (https://github.com/pytorch/pytorch/commit/2ace4fc01e9d5ed1c2410a0630c378d26565b008)
Original commit changeset: aadc065c489b
fbshipit-source-id: efd8b7c3cbe03d5ab0afa0d7c695182623285a3a
