fix BC test, after removing __caffe2 ops (#48099)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/48099
Test Plan: Imported from OSS
Reviewed By: ezyang
Differential Revision: D25023321
Pulled By: bdhirsh
fbshipit-source-id: c9567b3dcfc2bea3587a17e4b6400fc490349365
