Revert D33262228: Per-overload torch.ops API
Test Plan: revert-hammer
Differential Revision:
D33262228 (https://github.com/pytorch/pytorch/commit/8e6d1738a41cb28c36db3dc5e10fd812417673de)
Original commit changeset: 600dbf511514
Original Phabricator Diff: D33262228 (https://github.com/pytorch/pytorch/commit/8e6d1738a41cb28c36db3dc5e10fd812417673de)
fbshipit-source-id: 238fa88ea9c4f26c7511334765c07452fbca9655
