function off(type, func) {
    var that = this;
    var listners;
    if (!arguments.length) {
      delete that[LISTENERS];
    } else if (!func) {
      listners = that[LISTENERS];
      if (listners) {
        delete listners[type];
        if (!Object.keys(listners).length) return off.call(that);
      }
    } else {
      listners = getListeners(that, type, true);
      if (listners) {
        listners = listners.filter(ne);
        if (!listners.length) return off.call(that, type);
        that[LISTENERS][type] = listners;
      }
    }
    return that;

    function ne(test) {
      return test !== func && test.originalListener !== func;
    }
  }
Remove an event listener.

@function EventLite.prototype.off
@param [type] {string}
@param [func] {Function}
@returns {EventLite} Self for method chaining