Revert part of #35 (#41)

Author: Nyholm

src/config/parameters.php

@@ -17,14 +17,3 @@
         'router' => ['utf8' => true],
     ]);
 }
-
-// Not setting the "framework.session.storage_factory_id" configuration option is deprecated in symfony 5.3
-if (\Symfony\Component\HttpKernel\Kernel::VERSION_ID >= 50300) {
-    $container->loadFromExtension('framework', [
-        'session' => ['storage_factory_id' => 'session.storage.factory.mock_file'],
-    ]);
-} else {
-    $container->loadFromExtension('framework', [
-        'session' => ['storage_id' => 'session.storage.mock_file'],
-    ]);
-}