Allow gerrit maintainers group to remove reviewers

Change-Id: Ica4b01bb51cb927c182f1521462ff5f822ce1108
diff --git a/project.config b/project.config
index 747a22e..b1dae7d 100644
--- a/project.config
+++ b/project.config
@@ -9,6 +9,7 @@
 	label-Verified = -1..+1 group Change Owner
 	label-Verified = -1..+1 group Project Owners
 	label-Verified = -1..+1 group gerrit-verifiers
+	removeReviewer = group google/gerritcodereview-maintainers@googlegroups.com
 	submit = group Change Owner
 	submit = group Project Owners
 [access "refs/tags/*"]