message: Delete unnecessary field for kocheckbox
diff: @@ -17,7 +17,6 @@ class QuestionCheckboxImplementor extends QuestionCheckboxBaseImplementor {
  export class QuestionCheckbox extends QuestionCheckboxModel {
  koAllSelected: any;
  private isAllSelectedUpdating = false;
  - private isHovered = ko.observable<boolean>(false);
  constructor(public name: string) {
  super(name);
  new QuestionCheckboxImplementor(this);
  