[Easy][c10d] Minor fixes (#73318)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/73318
Test Plan: Imported from OSS
Reviewed By: mrshenli
Differential Revision: D34431929
Pulled By: awgu
fbshipit-source-id: 9ee79a72b4fc2a86c2fd846e091e278dfc242898
(cherry picked from commit e7c920a593c771096649bc5abb40f775a381729d)
