Delete nextexplorer (ct) after migration to ProxmoxVE (#1608)

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

json/nextexplorer.json

@@ -1,41 +0,0 @@
-{
-  "name": "nextExplorer",
-  "slug": "nextexplorer",
-  "categories": [
-    11,
-    12
-  ],
-  "date_created": "2025-12-11",
-  "type": "ct",
-  "updateable": true,
-  "privileged": false,
-  "interface_port": 3000,
-  "documentation": "https://explorer.nxz.ai",
-  "website": "https://github.com/nxzai/nextExplorer",
-  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/nextexplorer.webp",
-  "config_path": "/etc/nextExplorer/.env",
-  "description": "Self-hosted file access for teams, homelabs, and agencies with a refined interface.",
-  "install_methods": [
-    {
-      "type": "default",
-      "script": "ct/nextexplorer.sh",
-      "resources": {
-        "cpu": 2,
-        "ram": 3072,
-        "hdd": 8,
-        "os": "Debian",
-        "version": "13"
-      }
-    }
-  ],
-  "default_credentials": {
-    "username": null,
-    "password": null
-  },
-  "notes": [
-    {
-      "text": "Bind mount your volume(s) in the `/mnt` directory",
-      "type": "info"
-    }
-  ]
-}