DX: apply rector rulesset up to PHP72

src/Bundle/ChillMainBundle/DependencyInjection/Widget/AddWidgetConfigurationTrait.php

@@ -139,7 +139,7 @@ trait AddWidgetConfigurationTrait
     protected function addWidgetsConfiguration(string $place, ContainerBuilder $containerBuilder)
     {
         $treeBuilder = new TreeBuilder($place);
-        $root = $treeBuilder->getRootNode($place)
+        $root = $treeBuilder->getRootNode()
             ->canBeUnset()
             ->info('register widgets on place "' . $place . '"');
 
@@ -170,7 +170,7 @@ trait AddWidgetConfigurationTrait
         // adding the possible config on each widget under the widget_alias
         foreach ($this->filterWidgetByPlace($place) as $factory) {
             $builder = new TreeBuilder($factory->getWidgetAlias());
-            $widgetOptionsRoot = $builder->getRootNode($factory->getWidgetAlias());
+            $widgetOptionsRoot = $builder->getRootNode();
             $widgetOptionsRoot->canBeUnset()
                 ->info(sprintf(
                     'the configuration for the widget "%s" (only required if this widget is set in widget_alias)',