Revert D24874754: [pytorch][PR] Add test for empty tensors for batch matmuls
Test Plan: revert-hammer
Differential Revision:
D24874754 (https://github.com/pytorch/pytorch/commit/5f105e2aa6d021029811c7085512a3b1bba3f578)
Original commit changeset: 41ba837740ff
fbshipit-source-id: d6cb31cbc4a2a386aab0a5f24710f218f9a561ca
