ret is never reassigned, return 0 directly (#48609)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48609
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Reviewed By: zhangguanheng66
Differential Revision: D25228678
Pulled By: ezyang
fbshipit-source-id: b0b501866c9beb509b0c8c37d074e2d276085a56
