Delete foldergram (ct) after migration to ProxmoxVE (#1742)

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

json/foldergram.json

@@ -1,40 +0,0 @@
-{
-  "name": "Foldergram",
-  "slug": "foldergram",
-  "categories": [
-    21
-  ],
-  "date_created": "2026-03-26",
-  "type": "ct",
-  "updateable": true,
-  "privileged": false,
-  "interface_port": 4141,
-  "documentation": "https://foldergram.github.io/quick-start",
-  "website": "https://foldergram.github.io/",
-  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/foldergram.webp",
-  "description": "Foldergram is a self-hosted web application that turns your local folders into a beautiful, instagram-style feed and profile. It turns your local folder to app folders (profiles), and serves a lightning-fast Progressive Web App (PWA).",
-  "install_methods": [
-    {
-      "type": "default",
-      "script": "ct/foldergram.sh",
-      "config_path": "/opt/foldergram_media/foldergram.env",
-      "resources": {
-        "cpu": 1,
-        "ram": 2048,
-        "hdd": 4,
-        "os": "Debian",
-        "version": "13"
-      }
-    }
-  ],
-  "default_credentials": {
-    "username": null,
-    "password": null
-  },
-  "notes": [
-    {
-      "text": "Media data (gallery, database, thumbnails, previews) is stored under /opt/foldergram_media. Place your photos and videos in /opt/foldergram_media/gallery.",
-      "type": "info"
-    }
-  ]
-}