Revert D24574649: [pytorch][PR] Utility that loads a DP/DDP model state dict into a non-DDP model with the same architecture.
Test Plan: revert-hammer
Differential Revision:
D24574649 (https://github.com/pytorch/pytorch/commit/b631c872c9e3c01bd0cd490497eaf96957873a33)
Original commit changeset: 17d29ab16ae2
fbshipit-source-id: 6766c6b21b82c9463143da0370192d9c68dbce6c
