fix: remove loadMbeModels call from onMounted

- /api/v2/mbe/models endpoint doesn't exist on MarkBase
- Removing the call eliminates the 404 error on page load
- MBE model selector dropdown will remain empty but functional

src/views/AdminView.vue

@@ -1388,7 +1388,6 @@ async function loadMbeModels() {
 
 onMounted(async () => { 
   loadServiceUrls()
-  await loadMbeModels()
   await Promise.all([loadDashboard(), loadShares(), loadSettings()])
   await Promise.all([testCoreApi(), testMarkbase(), testMbe(), testProxy(), testWorker()])
 })