pytorch

54071085 - CopyBackward: Remove redundant src_device and unnecessary copy=True (#60025)

CopyBackward: Remove redundant src_device and unnecessary copy=True (#60025) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/60025 `to` already copies unconditionally if `src.device() != options.device()` so specifying the copy argument is unnecessary. `src.device()` is also completely equivalent to `src.options().device()` so storing both is redundant. Test Plan: Imported from OSS Reviewed By: zou3519 Differential Revision: D29698627 Pulled By: albanD fbshipit-source-id: eb091d39b71db688e6bcbb33a227c01b94b432bb