pytorch

227beb90 - Revert D20680520: New operator registration API

Revert D20680520: New operator registration API Test Plan: revert-hammer Differential Revision: D20680520 Original commit changeset: 5d39a28e4ec7 fbshipit-source-id: 5b2497ffc24db9a05b01d526f161bc0164f9f707