public static boolean deleteShutdownHook(Runnable shutdownHook) {
    return instance.removeShutdownHook(shutdownHook);
  }
This class provides ShutdownHookManager shims for HBase to interact with the Hadoop 1.0.x and the
Hadoop 2.0+ series. NOTE: No testing done against 0.22.x, or 0.21.x.
hbase-server/src/main/java/org/apache/hadoop/hbase/util/ShutdownHookManager.java