I have deleted auto response multiple times for my forms.

I have deleted auto response multiple times for my forms. And it still finds it way back to the form.

Is it that when a form is updated, the auto response gets updated too?

I really do not want auto response for certain forms.

An autoresponder email is added to the form by default when an email field is added to the form.  Once that autoresponder is removed though, it should remain deleted.  I tested a few times on my end and the email does remain removed once it is removed.  If there is a form that isn't saving those changes properly, let us know and we will take a look.