docs: remove all deprecated @stable jsdoc tags (#23210)

These are no longer needed as stable docs are computed as those that
do not have `@experimental` or `@deprecated` tags.

PR Close #23210

packages/router/src/directives/router_link.ts

@@ -88,7 +88,7 @@ import {UrlTree} from '../url_tree';
  *
  * @ngModule RouterModule
  *
- * @stable
+ *
  */
 @Directive({selector: ':not(a)[routerLink]'})
 export class RouterLink {
@@ -160,7 +160,7 @@ export class RouterLink {
  *
  * @ngModule RouterModule
  *
- * @stable
+ *
  */
 @Directive({selector: 'a[routerLink]'})
 export class RouterLinkWithHref implements OnChanges, OnDestroy {

packages/router/src/directives/router_link_active.ts

@@ -70,7 +70,7 @@ import {RouterLink, RouterLinkWithHref} from './router_link';
  *
  * @ngModule RouterModule
  *
- * @stable
+ *
  */
 @Directive({
   selector: '[routerLinkActive]',

packages/router/src/directives/router_outlet.ts

@@ -33,7 +33,7 @@ import {PRIMARY_OUTLET} from '../shared';
  * ```
  * @ngModule RouterModule
  *
- * @stable
+ *
  */
 @Directive({selector: 'router-outlet', exportAs: 'outlet'})
 export class RouterOutlet implements OnDestroy, OnInit {