DefaultRefFilter: Do not log each refs/cache-automerge/ refs that is filtered out

This is blowing up traces and doesn't provide any value (all
refs/cache-automerge/ refs are always filtered out).

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Id3faf8da930d92e393594290cb8ed19256925ebe

java/com/google/gerrit/server/permissions/DefaultRefFilter.java

@@ -260,7 +260,6 @@ class DefaultRefFilter {
       Account.Id accountId;
       AccountGroup.UUID accountGroupUuid;
       if (name.startsWith(REFS_CACHE_AUTOMERGE)) {
-        logger.atFinest().log("Filter out ref %s", name);
         continue;
       } else if (opts.filterMeta() && isMetadata(name)) {
         logger.atFinest().log("Filter out metadata ref %s", name);