public boolean removeServerFromSystem(ObjectName objectName, CacheServerMXBean proxy,
      FederationComponent oldState) {
    if (mapOfServers != null) {
      mapOfServers.remove(objectName);
      serverSetSize = mapOfServers.values().size();
      if (mapOfServers.values().size() == 0) {
        serverSetSize = 0;
        return true;
      }
    }
    updateCacheServer(objectName, null, oldState);
    return false;
  }
Removed the proxy from the map.

@param objectName name of the proxy to be removed.
@param proxy actual reference to the proxy object
@return whether all proxies have been removed or not. In this case it will always be false.
        Kept it for consistency for MBeanAggregator.
geode-core/src/main/java/org/apache/geode/management/internal/beans/DistributedSystemBridge.java