Revert "Restrict access to branch release-R125 to LTS Refresher group."

This reverts commit c9d7172751afe683da0ffebe4810f9c44ef9da1f.

Reason for revert: LTS refresh is done

Change-Id: Ide3df0de24f8803c995a487860935f3aaadd6051
Reviewed-on: https://cos-review.googlesource.com/c/All-Projects/+/149684
Tested-by: Chenglong Tang <chenglongtang@google.com>
Reviewed-by: Derek Taylor <ddtaylor@google.com>