Revert D27926270: [pytorch][PR] [profiler] Add cuda synchronization points
Test Plan: revert-hammer
Differential Revision:
D27926270 (https://github.com/pytorch/pytorch/commit/38bb0ac3e8d8a880fdc3f62392cec4e02c664f32)
Original commit changeset: 5cf30128590c
fbshipit-source-id: 940da27f5c921d8921191188230807f1708e3e1f
