fix: remove unused appconfig assignation

Author: innocenzi

src/Tempest/Framework/Testing/IntegrationTest.php

@@ -16,6 +16,7 @@
 use Tempest\Console\OutputBuffer;
 use Tempest\Console\Testing\ConsoleTester;
 use Tempest\Container\GenericContainer;
+use Tempest\Core\AppConfig;
 use Tempest\Core\ExceptionTester;
 use Tempest\Core\FrameworkKernel;
 use Tempest\Core\Kernel;
@@ -119,8 +120,6 @@ protected function setupKernel(): self
         $container = $this->kernel->container;
         $this->container = $container;
 
-        $this->appConfig = $this->container->get(className: AppConfig::class);
-
         return $this;
     }