remove unnecessary code

apps/backend/database/seeders/DatabaseSeeder.php

@@ -1,15 +1,12 @@
 <?php
 
-namespace database\seeders;
+namespace Database\Seeders;
 
-use apps\backend\database\seeders\DevSeeder;
-use apps\backend\database\seeders\ProdSeeder;
 use Illuminate\Database\Seeder;
-use function Database\Seeders\config;
 
 class DatabaseSeeder extends Seeder
 {
-    public function run()
+    public function run(): void
     {
         if (config('app.dev') == 1) {
             $this->call(DevSeeder::class);
@@ -18,4 +15,3 @@ class DatabaseSeeder extends Seeder
         }
     }
 }
-