Revert D30468409: Add fx2trt pass for removing duplicate output args
Test Plan: revert-hammer
Differential Revision:
D30468409 (https://github.com/pytorch/pytorch/commit/6da7552a8eaae6b85e271bf3edac2fa2ae9f1148)
Original commit changeset: b4d91b76ab5d
fbshipit-source-id: e138dc425fe55ffe3585ea5fac4db476931bafed
