pytorch

54181762 - [Easy] Add comment explaining DistributedOptimizer gating (#71603)

[Easy] Add comment explaining DistributedOptimizer gating (#71603) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/71603 Small comment to clarify this. ghstack-source-id: 147577171 Test Plan: CI Reviewed By: cbalioglu Differential Revision: D33688994 fbshipit-source-id: 4c87e6ed48416a0aad695861893f183bee7c5252 (cherry picked from commit f8868629c160de01d16f675e69c9f3d4321c04cb)