Remove Operations overview and its polling endpoint

src/routes/api/operations/+server.ts

@@ -1,6 +0,0 @@
-import { json } from '@sveltejs/kit';
-import { operationsOverview } from '$lib/server/operations-overview.js';
-
-export function GET() {
-    return json(operationsOverview(), { headers: { 'Cache-Control': 'no-store' } });
-}