Revert D34645508: [PyTorch] Use c10::Synchronized<T> in RWSafeLeftRightWrapper
Test Plan: revert-hammer
Differential Revision:
D34645508 (https://github.com/pytorch/pytorch/commit/62ff23db6bcbd6adba86ecfadf0d7e6adcccdf6d)
Original commit changeset: effa8064f925
Original Phabricator Diff: D34645508 (https://github.com/pytorch/pytorch/commit/62ff23db6bcbd6adba86ecfadf0d7e6adcccdf6d)
fbshipit-source-id: 4f9bfc79c06a626fccc5cad9faeaa33e00f4f718
(cherry picked from commit ed51c6cd07edb641d2b5712f4ea3a291a772a2b7)
