remove unused argument in import.cpp (#22205)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22205
ghimport-source-id: afdf13f6515a1352cde4cbb7b45bf01e717bcf4d
Test Plan: Imported from OSS
Differential Revision: D15998763
Pulled By: suo
fbshipit-source-id: 6e5c1c668b9de5e352d2aa7ca27197deb42ca94b
