The honeypot and current page submit features are invisible security that helps prevent bots from submitting through your form. Since these elements do not display on your page or affect functionality this was not included in the How To. To avoid removing any necessary code, it is advised that you leave these two features on you form.
Denis, i believe you are referencing an outdated document that will not work with the current release of the contact form. You'll notice the most recent version uses Spry validation which would also need to be removed.