Fix test for TranslatableActivityTypeTest.php

src/Bundle/ChillActivityBundle/Tests/Form/Type/TranslatableActivityTypeTest.php

@@ -27,18 +27,11 @@ final class TranslatableActivityTypeTest extends KernelTestCase
      */
     protected $builder;
 
-    /**
-     * @var \Symfony\Component\DependencyInjection\ContainerInterface
-     */
-    protected $container;
-
     protected function setUp(): void
     {
         self::bootKernel();
 
-        $this->container = self::$kernel->getContainer();
-
-        $this->builder = $this->container
+        $this->builder = self::$container
             ->get('form.factory')
             ->createBuilder(FormType::class, null, [
                 'csrf_protection' => false,