Remove trailing whitespace introduced in #52175 (#53762)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/53762
Test Plan: CI.
Reviewed By: seemethere
Differential Revision: D26961133
Pulled By: samestep
fbshipit-source-id: 972ea480baa3f34b65327abdf7e8bfdf30788572
