pytorch

dcd16852 - Revert D13440858: [pytorch][PR] Use a pool of per-thread cudnn handles for each device, updated

Revert D13440858: [pytorch][PR] Use a pool of per-thread cudnn handles for each device, updated Differential Revision: D13440858 Original commit changeset: 1c6af5c53538 fbshipit-source-id: fda42ea75000d4a4e9c4a8eeaaa5518f7ad9c298