pytorch

9e5e5a7d - Revert D26815021: Revert D26744062: Add assert_async

Revert D26815021: Revert D26744062: Add assert_async Test Plan: revert-hammer Differential Revision: D26815021 Original commit changeset: 972eaafcdf14 fbshipit-source-id: e528260e1aa91df1873c73af00aa57addd671607