fix warnings

actionpack/test/abstract_unit.rb

@@ -318,7 +318,7 @@ def send_request(uri_or_host, method, path)
 
     def request_path_params(path, method: 'GET')
       resp = send_request URI('http://localhost' + path), method.to_s.upcase, nil
-      status, headers, body = *resp
+      status = resp.first
       if status == 404
         raise ActionController::RoutingError, "No route matches #{path.inspect}"
       end