Revert D27960767: ns for fx: allow comparing int8 to int8 for functionals
Test Plan: revert-hammer
Differential Revision:
D27960767 (https://github.com/pytorch/pytorch/commit/502c58ad84cf51a9eae4089cb8bb5f19436a6cef)
Original commit changeset: abc911ca4b9e
fbshipit-source-id: 9bb1aa9d0e764bfd2dd6745af897d958c054ef3a
