Reenable test_nn tests for Windows (#52051)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/52002
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52051
Reviewed By: ngimel
Differential Revision: D26409749
Pulled By: janeyx99
fbshipit-source-id: 5fa76d4fff8cf0fe2130c925fde9dffd0d1e7172
