pytorch

7c9e7ef1 - Revert D21171747: [pytorch][PR] Rebase xla job on top master before running CI build.

Revert D21171747: [pytorch][PR] Rebase xla job on top master before running CI build. Test Plan: revert-hammer Differential Revision: D21171747 Original commit changeset: 433ea0e14d03 fbshipit-source-id: 6d5538a3533356997077bb1b8cd46aa6ec4332f8