Delete alpine-borgbackup-server (ct) after migration to ProxmoxVE (#1607)

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

json/alpine-borgbackup-server.json

@@ -1,44 +0,0 @@
-{
-  "name": "Alpine-BorgBackup-Server",
-  "slug": "alpine-borgbackup-server",
-  "categories": [
-    7
-  ],
-  "date_created": "2026-02-16",
-  "type": "ct",
-  "updateable": true,
-  "privileged": false,
-  "interface_port": null,
-  "documentation": "https://www.borgbackup.org/",
-  "website": "https://www.borgbackup.org/",
-  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/borg.webp",
-  "config_path": "",
-  "description": "Alpine-BorgBackup-Server is a lightweight containerized backup server based on Alpine Linux and BorgBackup. It provides a secure and efficient way to manage your backups with minimal resource usage, making it ideal for Proxmox VE environments.",
-  "install_methods": [
-    {
-      "type": "default",
-      "script": "ct/alpine-borgbackup-server.sh",
-      "resources": {
-        "cpu": 2,
-        "ram": 1024,
-        "hdd": 20,
-        "os": "alpine",
-        "version": "3.23"
-      }
-    }
-  ],
-  "default_credentials": {
-    "username": null,
-    "password": null
-  },
-  "notes": [
-    {
-      "text": "After installation, use the 'update' option in the script to configure SSH access and/or password authentication.",
-      "type": "info"
-    },
-    {
-      "text": "Refer to the official BorgBackup documentation for setup and usage instructions.",
-      "type": "info"
-    }
-  ]
-}