Revert D33163841: Revert D33102715: Back out "Revert D32606547: torch/monitor: add C++ events and handlers"
Test Plan: revert-hammer
Differential Revision:
D33163841
Original commit changeset: e262b6d8c80a
Original Phabricator Diff: D33102715 (https://github.com/pytorch/pytorch/commit/eb374de3f538c19b3bc88d257101e39d3eb05e7d)
fbshipit-source-id: 644216036a238a458f0a2198460b36d24fb035f8
