Delete languagetool (ct) after migration to ProxmoxVE (#1372)

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

frontend/public/json/languagetool.json

@@ -1,44 +0,0 @@
-{
-  "name": "LanguageTool",
-  "slug": "languagetool",
-  "categories": [
-    0
-  ],
-  "date_created": "2025-12-10",
-  "type": "ct",
-  "updateable": true,
-  "privileged": false,
-  "interface_port": 8081,
-  "documentation": "https://dev.languagetool.org/",
-  "config_path": "/opt/LanguageTool/server.properties",
-  "website": "https://languagetool.org/",
-  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/languagetool.webp",
-  "description": "LanguageTool is an Open Source proofreading software for English, Spanish, French, German, Portuguese, Polish, Dutch, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect.",
-  "install_methods": [
-    {
-      "type": "default",
-      "script": "ct/languagetool.sh",
-      "resources": {
-        "cpu": 2,
-        "ram": 4096,
-        "hdd": 8,
-        "os": "Debian",
-        "version": "13"
-      }
-    }
-  ],
-  "default_credentials": {
-    "username": null,
-    "password": null
-  },
-  "notes": [
-    {
-      "text": "API is available at `http://<LXC_IP>:8081/v2`.",
-      "type": "info"
-    },
-    {
-      "text": "Application doesn't come with n-gram data. If you wish to use that feature, please look at `https://dev.languagetool.org/finding-errors-using-n-gram-data.html`.",
-      "type": "info"
-    }
-  ]
-}