public static void deleteNodeFailSilent(ZKWatcher zkw, String node) throws KeeperException {
    deleteNodeFailSilent(zkw, (DeleteNodeFailSilent) ZKUtilOp.deleteNodeFailSilent(node));
  }
Deletes the specified node. Fails silent if the node does not exist.
@param zkw  reference to the {@link ZKWatcher} which also contains configuration and operation
@param node the node to delete
@throws KeeperException if a ZooKeeper operation fails
hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java