Revert D23360705: [pytorch][PR] Add amax/amin
Test Plan: revert-hammer
Differential Revision:
D23360705 (https://github.com/pytorch/pytorch/commit/bcec8cc3f9b14a79895af026891e9fd5f4a01b0a)
Original commit changeset: 5bdeb08a2465
fbshipit-source-id: 76a9e199823c7585e55328bad0778bcd8cd49381
