removal of unnecessary file, and composer update

vendor/symfony/http-foundation/StreamedResponse.php

@@ -111,7 +111,7 @@ class StreamedResponse extends Response
             throw new \LogicException('The Response callback must not be null.');
         }
 
-        \call_user_func($this->callback);
+        ($this->callback)();
 
         return $this;
     }