Revert D29241736: [pytorch][PR] To add Rectified Adam Algorithm to Optimizers
Test Plan: revert-hammer
Differential Revision:
D29241736 (https://github.com/pytorch/pytorch/commit/0d2a936176ab8c4ecf3651f3360212f088039ff1)
Original commit changeset: 288b9b1f3125
fbshipit-source-id: 56c4ec98647c6f1822b130726741a1c9ca193670
