pytorch

bcc7dbdf - Change open source unit test deps (#70167)

Change open source unit test deps (#70167) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/70167 1. Change unit test dependency to open source base class, so that this unit test can run on git oss CI 2. Remove usage of typing.Protocol, so that lower can run with Python 3.6 Test Plan: oss CI passed with change included in commit: https://github.com/pytorch/pytorch/actions/runs/1597530689 see test(fx2trt) Reviewed By: yinghai Differential Revision: D33228894 fbshipit-source-id: ffe3d40a02a642b3b857a0605101797037a580bb