Revert "Merge type stubs for torch.nn.parallel (#101528)"
This reverts commit 6cabc105bb7c9cce4e23bdcc4a921613caae0f9a.
Reverted https://github.com/pytorch/pytorch/pull/101528 on behalf of https://github.com/kit1980 due to Broke inductor tests https://github.com/pytorch/pytorch/actions/runs/5071348299/jobs/9107880424 ImportError: cannot import name 'get_a_var' from 'torch.nn.parallel.parallel_apply' ([comment](https://github.com/pytorch/pytorch/pull/101528#issuecomment-1561732862))
