Fix lint (#37922)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37922
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Differential Revision: D21426425
Pulled By: ezyang
fbshipit-source-id: 9d0d997f608a742668f64e7529c41feb39bec24e
