private void onUserRemoved(int userId){
synchronized (this) {
    mDbHelpers.delete(userId);
    if (LOCAL_LOGV)     Log.d(TAG,"User " + userId + " is removed");
  }
}

private void onUserRemoved ( int userId ) { synchronized ( this ) { mDbHelpers . delete ( userId ) ; if ( LOCAL_LOGV ) Log . d ( TAG , "User " + userId + " is removed" ) ; } }
performs cleanup for the removed user .
