fix deprecation warning.

src/Http/ServerRequest.php

@@ -956,7 +956,6 @@ class ServerRequest implements ArrayAccess, ServerRequestInterface
     public function here($base = true)
     {
         deprecationWarning(
-            'This method will be removed in 4.0.0. ' .
             'This method will be removed in 4.0.0. You should use getRequestTarget() instead.'
         );