code: function remove( element ) {
      for( var i = 0; i < lists.length; i++ ) {
        var list = lists[i];
  
        if( list.element == element ) {
          list.destroy();
          lists.splice( i, 1 );
          i--;
        }
      }
  
      // Stopped refreshing if the last list was removed
      if( lists.length === 0 ) {
        active = false;
      }
    }
docs: Stops monitoring a list element and removes any classes
  that were applied to its list items.
  
  @param {HTMLElement} element