Please remove need for API on message callback

I really enjoy contact form 7, but a few updates ago you are now using WordPress’s api to get a message callback to notify the user the message could be sent.

I block/restrict the API on WordPress.
Therefore I don’t get a message when email is set, just a spinning graphic that goes forever.

1) There have been know security issues with the API, and fixed or not fixed there will probably be more in the future.
2) I don’t use the API so there is no need for it to be active.