Uninstalls the trigger for the specified queue -- if a queue has no
       trigger, this function is a no-op.

def untrigger(queue, trigger=_c.FSQ_TRIGGER):
    '''Uninstalls the trigger for the specified queue -- if a queue has no
       trigger, this function is a no-op.'''
    trigger_path = fsq_path.trigger(queue, trigger=trigger)
    _queue_ok(os.path.dirname(trigger_path))
    try:
        os.unlink(trigger_path)
    except (OSError, IOError, ), e:
        if e.errno != errno.ENOENT:
            raise FSQConfigError(e.errno, wrap_io_os_err(e))