docs: update comment

Author: kenjis

src/Filters/ChainAuth.php

@@ -17,7 +17,6 @@
 use CodeIgniter\HTTP\IncomingRequest;
 use CodeIgniter\HTTP\RedirectResponse;
 use CodeIgniter\HTTP\RequestInterface;
-use CodeIgniter\HTTP\Response;
 use CodeIgniter\HTTP\ResponseInterface;
 
 /**
@@ -29,14 +28,8 @@
 class ChainAuth implements FilterInterface
 {
     /**
-     * Do whatever processing this filter needs to do.
-     * By default it should not return anything during
-     * normal execution. However, when an abnormal state
-     * is found, it should return an instance of
-     * CodeIgniter\HTTP\Response. If it does, script
-     * execution will end and that Response will be
-     * sent back to the client, allowing for error pages,
-     * redirects, etc.
+     * Checks authenticators in sequence to see if the user is logged in through
+     * either of authenticators.
      *
      * @param array|null $arguments
      *