Revert D31894777: [pytorch][PR] Replace issue templates with new issue forms
Test Plan: revert-hammer
Differential Revision:
D31894777 (https://github.com/pytorch/pytorch/commit/62feadd76fb5760faccd526d9064b9ba5de13083)
Original commit changeset: fbd39f7ed4ca
fbshipit-source-id: 4698ff5fe8629f9ad0249425a369c6f0bd89c891