function removeListener(type, listener) {
    var me = this,
        events = me.events;

    forEach(type.split(' '), function(type) {
      var listeners = events && events[type] || [],
          index = indexOf(listeners, listener);
      if (index > -1) {
        listeners.splice(index, 1);
      }
    });
    return me;
  }
Unregisters a single listener for the specified event type(s).
@memberOf Benchmark, Benchmark.Suite
@param {String} type The event type.
@param {Function} listener The function to unregister.
@returns {Object} The benchmark instance.
@example

// unregister a listener for an event type
bench.removeListener('cycle', listener);

// unregister a listener for multiple event types
bench.removeListener('start cycle', listener);