[DDP] Remove redundant pass statement (#54219)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54219
There is no need for this ``pass``.
ghstack-source-id: 125124311
Test Plan: CI
Reviewed By: zhaojuanmao
Differential Revision: D27105234
fbshipit-source-id: 95496fa785fdc66a6c3c8ceaa14af565588325df
