Revert D33994011: Make debug_pkl smaller by only emitting unique traces.
Test Plan: revert-hammer
Differential Revision:
D33994011 (https://github.com/pytorch/pytorch/commit/3d37f5b05273304fb30fe8102434bdd5ee490bd7)
Original commit changeset: 8e6224c6e942
Original Phabricator Diff: D33994011 (https://github.com/pytorch/pytorch/commit/3d37f5b05273304fb30fe8102434bdd5ee490bd7)
fbshipit-source-id: 885e739efa1081382e1fcf9c6cccba92c57e9f7a
(cherry picked from commit a6d98c85a736c2eb321a6f38005dd0f5dc43eb87)
