Revert "[MPS] Add argmin (#80828)"
This reverts commit 37ebcc8a80471d8a3b8ad6ec4205b711df55a5c2.
Reverted https://github.com/pytorch/pytorch/pull/80828 on behalf of https://github.com/suo due to Broke Mac tests on master: https://hud.pytorch.org/pytorch/pytorch/commit/37ebcc8a80471d8a3b8ad6ec4205b711df55a5c2
