Revert D30384746: [fx2trt] Add a test for quantized resnet18
Test Plan: revert-hammer
Differential Revision:
D30384746 (https://github.com/pytorch/pytorch/commit/10dfa58eba055a1bbc1cc89df033cd2815cbb403)
Original commit changeset: 1a8638777116
fbshipit-source-id: b93235323e229b391f5456f6e3543988062dd0d4
