pytorch

cfd9360d - Revert D26837780: Revert D26819810: Revert D26815021: Revert D26744062: Add assert_async

Revert D26837780: Revert D26819810: Revert D26815021: Revert D26744062: Add assert_async Test Plan: revert-hammer Differential Revision: D26837780 Original commit changeset: 21567cab5c0f fbshipit-source-id: 8ea735e5fdc97e32ae3fafd40297a1b8a7cd34b0