OZG-5977 remove unused import

Sub task: OZG-7784

alfa-client/libs/postfach/src/lib/postfach-mail-form/postfach-mail-form.component.ts

@@ -31,7 +31,6 @@ import { Observable, of, tap } from 'rxjs';
 import { PostfachMailFormservice } from './postfach-mail.formservice';
 
 import { POSTFACH_NACHRICHT_UPLOADED_ATTACHMENTS } from '@admin-client/postfach-shared';
-import { KommentarLinkRel } from '@alfa-client/kommentar-shared';
 
 @Component({
   selector: 'alfa-postfach-mail-form',
@@ -44,7 +43,6 @@ export class PostfachMailFormComponent implements OnInit {
 
   public sendInProgress$: Observable<StateResource<CommandResource>> = of(createEmptyStateResource<CommandResource>());
 
-  public readonly KommentarLinkRel = KommentarLinkRel;
   public readonly PostfachMailListLinkRel = PostfachMailListLinkRel;
   public readonly PostfachMailLinkRel = PostfachMailLinkRel;
   public readonly POSTFACH_NACHRICHT_UPLOADED_ATTACHMENTS = POSTFACH_NACHRICHT_UPLOADED_ATTACHMENTS;