Revert D32599540: [pytorch][PR] implemented 'torch.distributions.constraints.symmetric' checking if the tensor is symmetric at last 2 dimension.
Test Plan: revert-hammer
Differential Revision:
D32599540 (https://github.com/pytorch/pytorch/commit/bc3bdbc8f48ff42238feb949fd7812b0a20bc329)
Original commit changeset: 9227f7e99318
fbshipit-source-id: edfe7072073d910a49be52e1b8c2d374ef71e9ec
