Revert D34604068: [PyTorch] [Model Tracer] Use c10::Synchronized<T> for kernel dtype tracer
Test Plan: revert-hammer
Differential Revision:
D34604068 (https://github.com/pytorch/pytorch/commit/6fd6fe0a23111a5257b57b06e31a8c17d432e770)
Original commit changeset: 1ec50ada8112
Original Phabricator Diff: D34604068 (https://github.com/pytorch/pytorch/commit/6fd6fe0a23111a5257b57b06e31a8c17d432e770)
fbshipit-source-id: 8b80bfd947c96108306e4472505c1af62c4fe8cb
(cherry picked from commit 62d6d2906e5a9537b2d1b3107261d8e8c531abb3)
