revert: remove accidental formatting in Response.php

Author: gr8man

system/HTTP/Response.php

@@ -16,6 +16,7 @@
 use CodeIgniter\Cookie\Cookie;
 use CodeIgniter\Cookie\CookieStore;
 use CodeIgniter\HTTP\Exceptions\HTTPException;
+use Config\App;
 use Config\Cookie as CookieConfig;
 
 /**