Remove code supporting older versions of symfony/config

Author: stof

DependencyInjection/Configuration.php

@@ -32,12 +32,7 @@ class Configuration implements ConfigurationInterface
     public function getConfigTreeBuilder()
     {
         $treeBuilder = new TreeBuilder('fos_user');
-
-        if (method_exists($treeBuilder, 'getRootNode')) {
-            $rootNode = $treeBuilder->getRootNode();
-        } else {
-            $rootNode = $treeBuilder->root('fos_user');
-        }
+        $rootNode = $treeBuilder->getRootNode();
 
         $supportedDrivers = ['orm', 'mongodb', 'couchdb', 'custom'];
 

composer.json

@@ -23,6 +23,8 @@
     "require": {
         "php": "^7.1.3 || ^8.0",
         "paragonie/random_compat": "^1 || ^2 || ^9",
+        "symfony/config": "^4.4",
+        "symfony/dependency-injection": "^4.4",
         "symfony/form": "^4.4",
         "symfony/framework-bundle": "^4.4",
         "symfony/security-bundle": "^4.4",