Revert "send with **options only when options is not empty"

This reverts commit 5665fb5f6e.

This adhoc workaround is no longer needed because the root cause has been fixed upstream

actionpack/lib/action_dispatch/testing/integration.rb

@@ -358,13 +358,9 @@ module ActionDispatch
             @html_document = nil
           end
 
-          result = if options.any?
-            integration_session.__send__(method, *args, **options)
-          else
-            integration_session.__send__(method, *args)
+          integration_session.__send__(method, *args, **options).tap do
+            copy_session_variables!
           end
-          copy_session_variables!
-          result
         end
       end