Upgrade to Laravel 9 (#4413)

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

app/Services/Users/UserDeletionService.php

@@ -1,13 +1,5 @@
 <?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\Services\Users;
 
 use Pterodactyl\Models\User;
@@ -19,43 +11,21 @@ use Pterodactyl\Contracts\Repository\ServerRepositoryInterface;
 class UserDeletionService
 {
     /**
-     * @var \Pterodactyl\Contracts\Repository\UserRepositoryInterface
-     */
-    protected $repository;
-
-    /**
-     * @var \Illuminate\Contracts\Translation\Translator
-     */
-    protected $translator;
-
-    /**
-     * @var \Pterodactyl\Contracts\Repository\ServerRepositoryInterface
-     */
-    protected $serverRepository;
-
-    /**
-     * DeletionService constructor.
+     * UserDeletionService constructor.
      */
     public function __construct(
-        ServerRepositoryInterface $serverRepository,
-        Translator $translator,
-        UserRepositoryInterface $repository
+        protected UserRepositoryInterface $repository,
+        protected ServerRepositoryInterface $serverRepository,
+        protected Translator $translator
     ) {
-        $this->repository = $repository;
-        $this->translator = $translator;
-        $this->serverRepository = $serverRepository;
     }
 
     /**
      * Delete a user from the panel only if they have no servers attached to their account.
      *
-     * @param int|\Pterodactyl\Models\User $user
-     *
-     * @return bool|null
-     *
      * @throws \Pterodactyl\Exceptions\DisplayException
      */
-    public function handle($user)
+    public function handle(int|User $user): ?bool
     {
         if ($user instanceof User) {
             $user = $user->id;