pytorch

b3008fad - Revert D16220638: [pytorch][PR] Detect and handle NCCL errors appropriately in ProcessGroupNCCL.

Revert D16220638: [pytorch][PR] Detect and handle NCCL errors appropriately in ProcessGroupNCCL. Differential Revision: D16220638 Original commit changeset: fbc8881ea0c3 fbshipit-source-id: 10d2f3d446064adb3cf44e1f9911dcf259bbfbfb