fix SonarQube issues: mainly unused imports

src/routes/(angemeldet)/+layout.server.ts

@@ -1,8 +1,6 @@
 import { type ServerLoadEvent } from '@sveltejs/kit';
 import type { PageServerLoad } from '../anmeldung/$types';
 
-import { ROUTE_NAMES } from '..';
-
 export const load: PageServerLoad = (event: ServerLoadEvent) => {
 	if (event.locals.user) {
 		return {