Use more standardized phpcs

tests/Integration/Api/Client/Server/Subuser/CreateServerSubuserTest.php

@@ -156,9 +156,6 @@ class CreateServerSubuserTest extends ClientApiIntegrationTestCase
         $response->assertJsonPath('errors.0.detail', 'A user with that email address is already assigned as a subuser for this server.');
     }
 
-    /**
-     * @return array
-     */
     public function permissionsDataProvider(): array
     {
         return [[[]], [[Permission::ACTION_USER_CREATE]]];