pytorch

7cce2d9d - [DDP][BE] (Reland) Remove bucket replicas (#73567)

[DDP][BE] (Reland) Remove bucket replicas (#73567) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/73567 Test Plan: Imported from OSS Reviewed By: zhaojuanmao Differential Revision: D34552126 Pulled By: awgu fbshipit-source-id: b10ad288e3856caf91ffd7a217db7fa16a000dba (cherry picked from commit 4625a7e869cd17199fbcd1e21d142b48aa340b94)