Revert "Restrict access to branch release-R117 to LTS Refresher group."

This reverts commit e745001e494726f2c67c3c2231eb21745051c1ed.

Reason for revert: LTS refresh is completed

Change-Id: I80e5635c984c8b8f0498009e70b275baa6fd61ec
Reviewed-on: https://cos-review.googlesource.com/c/All-Projects/+/166368
Tested-by: Derek Taylor <ddtaylor@google.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>