Useless directive removed

src/Squidex/app/framework/angular/indeterminate.directive.ts

@@ -1,22 +0,0 @@
-/*
- * Squidex Headless CMS
- *
- * @license
- * Copyright (c) Sebastian Stehle. All rights reserved
- */
-
-import { Directive, ElementRef, OnInit } from '@angular/core';
-
-@Directive({
-    selector: '[indeterminate]'
-})
-export class IndeterminateDirective implements OnInit {
-    constructor(
-        private readonly element: ElementRef
-    ) {
-    }
-
-    public ngOnInit() {
-        this.element.nativeElement.indeterminate = true;
-    }
-}

src/Squidex/app/framework/declarations.ts

@@ -17,7 +17,6 @@ export * from './angular/focus-on-change.directive';
 export * from './angular/focus-on-init.directive';
 export * from './angular/geolocation-editor.component';
 export * from './angular/http-utils';
-export * from './angular/indeterminate.directive';
 export * from './angular/json-editor.component';
 export * from './angular/markdown-editor.component';
 export * from './angular/modal-view.directive';