Nope. If you have not submitted an application via AMCAS, you have neither applied nor been accepted to a MD school. Your EAP acceptance is contingent, isn't it? If so, one of the contingencies is not applying elsewhere, isn't it? 😎
If so, you haven't officially applied, and you haven't been "accepted." Nothing to declare. What you are contemplating is done every year, by a ton of people spread across many schools across the country. They are not "reapplicants" who have turned down a prior acceptance. The contingent acceptance you would be turning down would be for the same cycle in which you are applying!