pytorch

459653a0 - Revert D30745921: [DDP] Fix when buffers are reassigned in module

Revert D30745921: [DDP] Fix when buffers are reassigned in module Test Plan: revert-hammer Differential Revision: D30745921 (https://github.com/pytorch/pytorch/commit/d59ecc02df70bad2273858c2fad2b4993133a3d3) Original commit changeset: 25eb1edbf445 fbshipit-source-id: 343ead86bf1e2d0b2d4124be331ea2fa437303ad