Remove gsutil acl command for bucket permissions.

The bucket is already fully public so new releases don't need to run this command.

This will prevent significant terminal spam during the release process as there are thousands of objects in the bucket.

Backports etcd-io@f0246a9

Signed-off-by: James Blair <mail@jamesblair.net>

scripts/release.sh

@@ -247,9 +247,6 @@ main() {
       log_callout "Pushing container images to gcr.io ${RELEASE_VERSION}${TARGET_ARCH}"
       docker push "gcr.io/etcd-development/etcd:${RELEASE_VERSION}${TARGET_ARCH}"
     done
-
-    log_callout "Setting permissions using gsutil..."
-    gsutil -m acl ch -u allUsers:R -r gs://artifacts.etcd-development.appspot.com
   fi
 
   ### Release validation