copy_ fixed on cuda so removing the workaround in test_many_promotions (#35528)
Summary:
copy_() launch failure fixed on cuda for complex https://github.com/pytorch/pytorch/issues/35344 so removing the workaround added in PR https://github.com/pytorch/pytorch/issues/34093
Pull Request resolved: https://github.com/pytorch/pytorch/pull/35528
Differential Revision: D20693228
Pulled By: anjali411
fbshipit-source-id: dbb6369aa5a21574a0a4fe878ca10e4ecc605f6b
