ci: Move MAX_JOBS to not set on Darwin (#71122)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71122
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Test Plan: Imported from OSS
Reviewed By: albanD
Differential Revision: D33515392
Pulled By: seemethere
fbshipit-source-id: 376608c9a6e2e685a07d5010ce443a3f02475ee5
