pytorch

38ac9e69 - Back out "[DDP] Disable reducer hooks from running outside of DDP backwards." (#61399)

Back out "[DDP] Disable reducer hooks from running outside of DDP backwards." (#61399) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/61399 Reverts https://github.com/pytorch/pytorch/pull/60921 Original commit changeset: fef76a0dd295 ghstack-source-id: 133581300 Test Plan: CI Differential Revision: D29594262 fbshipit-source-id: a308d3f10dbbb2169d9a7f60f2f28f139185ed1f