pytorch

6480d3f1 - Revert D15511921: [pytorch][PR] BatchSampler now uses list.clear() instead of creating new objects

Revert D15511921: [pytorch][PR] BatchSampler now uses list.clear() instead of creating new objects Differential Revision: D15511921 Original commit changeset: e943d21e75e1 fbshipit-source-id: 933b7ef74c7a530f0a2cc087c8ee6f0455cf9239