Remove unused code and unnecessary else branches

Author: alexandre-daubois

Controller/ControllerResolver.php

@@ -27,9 +27,9 @@ protected function instantiateController(string $class): object
         if ($controller instanceof AbstractController) {
             if (null === $previousContainer = $controller->setContainer($this->container)) {
                 throw new \LogicException(\sprintf('"%s" has no container set, did you forget to define it as a service subscriber?', $class));
-            } else {
-                $controller->setContainer($previousContainer);
             }
+
+            $controller->setContainer($previousContainer);
         }
 
         return $controller;