fix(admin): removed unused import in add-role-dialog.component.ts

Author: xflord

apps/admin-gui/src/app/shared/components/dialogs/add-role-dialog/add-role-dialog.component.ts

@@ -14,7 +14,6 @@ import {
 } from '@perun-web-apps/perun/openapi';
 import { SelectionModel } from '@angular/cdk/collections';
 import { ToEnrichedFacilityPipe } from '@perun-web-apps/perun/pipes';
-import { UntypedFormControl } from '@angular/forms';
 import { ImmediateFilterComponent } from '@perun-web-apps/perun/components';
 
 export interface AddRoleDialogData {