refactor(seeders): remove unused role assignment logic

Removed obsolete role assignment code in UserSeeder to simplify logic.

Author: SlimDeluxe

database/seeders/UserSeeder.php

@@ -40,11 +40,6 @@ public function run(): void
                 Address::factory()->create([
                     'user_id' => $user->id,
                 ]);
-
-                if (isset($preset['role'])) {
-                    setPermissionsTeamId($site->id);
-                    $user->assignRole($preset['role'])->save();
-                }
             }
         }