Revert D29589020: [pytorch][PR] adding a build_start_time_epoch to build meta info
Test Plan: revert-hammer
Differential Revision:
D29589020 (https://github.com/pytorch/pytorch/commit/d33066ab3ff0d292d3930ad9b4a36bd6910c088c)
Original commit changeset: 309fc3b01cbc
fbshipit-source-id: 9b50c1e8dd63e59ab4e593d250dfd5eeb623f0af
Author
Rong Rong (AI Infra)
