code: function (cls) {
          if (this.contains(cls)) {
            for (var i = 0; i < this.cls.length; i++) {
              if (this.cls[i] === cls) {
                break;
              }
            }
  
            this.cls.splice(i, 1);
            delete this.cls._map[cls];
            this._change();
          }
  
          return this;
        }
docs: Removes the specified class from the class list.
  
  @method remove
  @param {String} cls Class to be removed.
  @return {tinymce.ui.ClassList} Current class list instance.