Delete more tabs, fix lint. (#21142)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21142
ghimport-source-id: 4666c0731d9c08e9990ffafd0ae88fa1e7896348
Differential Revision: D15555285
Pulled By: ezyang
fbshipit-source-id: 9e5bfacf202ceba37bd29cfd5dcb651b7f79068d
