Revert D24649817: [pytorch][PR] Fix pickling for Tensor subclasses.
Test Plan: revert-hammer
Differential Revision:
D24649817 (https://github.com/pytorch/pytorch/commit/c4209f111559d0d50e6500ee18be9b92f425d931)
Original commit changeset: 1872faa36030
fbshipit-source-id: b9832cea45552bd8776909118c4324fbd61fd414
