Delete yubal (ct) after migration to ProxmoxVE (#1320)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

frontend/public/json/yubal.json

@@ -1,35 +0,0 @@
-{
-  "name": "Yubal",
-  "slug": "yubal",
-  "categories": [
-    13
-  ],
-  "date_created": "2026-01-05",
-  "type": "ct",
-  "updateable": true,
-  "privileged": false,
-  "interface_port": 8000,
-  "documentation": "https://github.com/guillevc/yubal/blob/master/README.md",
-  "website": "https://github.com/guillevc/yubal",
-  "config_path": "/opt/yubal.env",
-  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/yubal.webp",
-  "description": "YouTube Music album downloader with Spotify metadata auto-tagging.",
-  "install_methods": [
-    {
-      "type": "default",
-      "script": "ct/yubal.sh",
-      "resources": {
-        "cpu": 2,
-        "ram": 2048,
-        "hdd": 15,
-        "os": "debian",
-        "version": "13"
-      }
-    }
-  ],
-  "default_credentials": {
-    "username": null,
-    "password": null
-  },
-  "notes": []
-}