pytorch

81593167 - Revert D19941103: [pytorch] blas gemm fix for k=0

Revert D19941103: [pytorch] blas gemm fix for k=0 Test Plan: revert-hammer Differential Revision: D19941103 Original commit changeset: e1c85d1e7574 fbshipit-source-id: da12747130c60b61452aa46e269c66546a1075f9