Upgrade to Laravel 9 (#4413)

Co-authored-by: DaneEveritt <dane@daneeveritt.com>

app/Events/Server/Deleted.php

@@ -1,33 +1,19 @@
 <?php
-/**
- * Pterodactyl - Panel
- * Copyright (c) 2015 - 2017 Dane Everitt <dane@daneeveritt.com>.
- *
- * This software is licensed under the terms of the MIT license.
- * https://opensource.org/licenses/MIT
- */
 
 namespace Pterodactyl\Events\Server;
 
+use Pterodactyl\Events\Event;
 use Pterodactyl\Models\Server;
 use Illuminate\Queue\SerializesModels;
 
-class Deleted
+class Deleted extends Event
 {
     use SerializesModels;
 
-    /**
-     * The Eloquent model of the server.
-     *
-     * @var \Pterodactyl\Models\Server
-     */
-    public $server;
-
     /**
      * Create a new event instance.
      */
-    public function __construct(Server $server)
+    public function __construct(public Server $server)
     {
-        $this->server = $server;
     }
 }