Use fosuser_registration directly instead of wallabag_user.registration_enabled

src/Wallabag/UserBundle/Controller/RegistrationController.php

@@ -9,7 +9,7 @@ class RegistrationController extends FOSRegistrationController
 {
     public function registerAction(Request $request)
     {
-        if ($this->container->getParameter('wallabag_user.registration_enabled')) {
+        if ($this->container->getParameter('fosuser_registration')) {
             return parent::registerAction($request);
         }
 

src/Wallabag/UserBundle/Controller/SecurityController.php

@@ -14,7 +14,7 @@ class SecurityController extends FOSSecurityController
         return $this->render('FOSUserBundle:Security:login.html.twig',
             array_merge(
                 $data,
-                ['registration_enabled' => $this->container->getParameter('wallabag_user.registration_enabled')]
+                ['registration_enabled' => $this->container->getParameter('fosuser_registration')]
             )
         );
     }

src/Wallabag/UserBundle/DependencyInjection/Configuration.php

@@ -12,14 +12,6 @@ class Configuration implements ConfigurationInterface
         $treeBuilder = new TreeBuilder();
         $rootNode = $treeBuilder->root('wallabag_user');
 
-        $rootNode
-            ->children()
-                ->booleanNode('registration_enabled')
-                    ->defaultValue(true)
-                ->end()
-            ->end()
-        ;
-
         return $treeBuilder;
     }
 }

src/Wallabag/UserBundle/DependencyInjection/WallabagUserExtension.php

@@ -16,7 +16,6 @@ class WallabagUserExtension extends Extension
 
         $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
         $loader->load('services.yml');
-        $container->setParameter('wallabag_user.registration_enabled', $config['registration_enabled']);
     }
 
     public function getAlias()