pytorch

a50a389c - Revert D29701479: [pytorch][PR] Remove `_broadcast_object()` from `ZeroRedundancyOptimizer`

Revert D29701479: [pytorch][PR] Remove `_broadcast_object()` from `ZeroRedundancyOptimizer` Test Plan: revert-hammer Differential Revision: D29701479 (https://github.com/pytorch/pytorch/commit/9b5d9b404927d4438d449a36749fbe62273fdde4) Original commit changeset: c8d5f9057b32 fbshipit-source-id: 35ab1f399513fb9d1c4e73b1fa906e559d2a6994