fix: Reduce number of round trips for redis

Author: ikalachy

src/main/java/com/retailsvc/vertx/spi/cluster/redis/impl/SubscriptionCatalog.java

@@ -271,7 +271,7 @@ public void removeUnknownSubs(String self, Collection<String> availableNodeIds)
       RSet<RegistrationInfo> set = subsMap.get(key);
 
       try {
-        // Bulk remove
+        // Bulk remove all
         set.removeAll(staleValues);
 
         // Mark as updated because stale entries existed