pytorch

fdf2bdef - Revert D17450502: [pytorch][PR] [WIP] Enabled bfloat16 dtype on CUDA

Revert D17450502: [pytorch][PR] [WIP] Enabled bfloat16 dtype on CUDA Test Plan: revert-hammer Differential Revision: D17450502 Original commit changeset: 0a5acc5fe1b1 fbshipit-source-id: 6360e750e9805dc9c7c6ca8a9c16256ecd749416