Revert D34800969: [PyTorch] Add unit test for c10::Synchronized<T>
Test Plan: revert-hammer
Differential Revision:
D34800969 (https://github.com/pytorch/pytorch/commit/9b203f667ac096db9f5f5679ac3e3d7931c34d36)
Original commit changeset: e665ab0df2fa
Original Phabricator Diff: D34800969 (https://github.com/pytorch/pytorch/commit/9b203f667ac096db9f5f5679ac3e3d7931c34d36)
fbshipit-source-id: 9bd8afbde0992d7eeb0fb024f7d32a1ddf58374d
(cherry picked from commit ae9a652082ca63115f8785ae5cbf5b6ec2534408)
