Delete fladder (ct) after migration to ProxmoxVE (#1272)

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

frontend/public/json/fladder.json

@@ -1,35 +0,0 @@
-{
-    "name": "Fladder",
-    "slug": "fladder",
-    "categories": [
-        13
-    ],
-    "date_created": "2025-12-26",
-    "type": "ct",
-    "updateable": true,
-    "privileged": false,
-    "interface_port": 80,
-    "documentation": "https://github.com/DonutWare/Fladder/blob/develop/INSTALL.md#ubuntudebian",
-    "website": "https://github.com/DonutWare/Fladder",
-    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/fladder.webp",
-    "config_path": "/opt/fladder/assets/config/config.json",
-    "description": "Fladder is a simple Jellyfin frontend built on top of Flutter. It provides a modern interface to stream and sync content locally, manage libraries, support multiple profiles, and offers direct, transcode and offline playback with media segments skipping.",
-    "install_methods": [
-        {
-            "type": "default",
-            "script": "ct/fladder.sh",
-            "resources": {
-                "cpu": 2,
-                "ram": 2048,
-                "hdd": 4,
-                "os": "debian",
-                "version": "13"
-            }
-        }
-    ],
-    "default_credentials": {
-        "username": null,
-        "password": null
-    },
-    "notes": []
-}