Delete manyfold (ct) after migration to ProxmoxVE (#1335)

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

frontend/public/json/manyfold.json

@@ -1,40 +0,0 @@
-{
-    "name": "Manyfold",
-    "slug": "manyfold",
-    "categories": [
-        24
-    ],
-    "date_created": "2025-03-18",
-    "type": "ct",
-    "updateable": true,
-    "privileged": false,
-    "interface_port": 80,
-    "documentation": "https://manyfold.app/sysadmin/",
-    "website": "https://manyfold.app/",
-    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/manyfold.webp",
-    "config_path": "/opt/manyfold/.env",
-    "description": "Manyfold is an open source, self-hosted web application for managing a collection of 3d models, particularly focused on 3d printing.",
-    "install_methods": [
-        {
-            "type": "default",
-            "script": "ct/manyfold.sh",
-            "resources": {
-                "cpu": 4,
-                "ram": 4096,
-                "hdd": 15,
-                "os": "debian",
-                "version": "13"
-            }
-        }
-    ],
-    "default_credentials": {
-        "username": null,
-        "password": null
-    },
-    "notes": [
-        {
-            "text": "Setup library on first connection in /opt/manyfold/data",
-            "type": "info"
-        }
-    ]
-}