I've already had a problem of this type because of Google Analytics, if it's your case, you need to remove iAd.framework and libAdIdAccess.a from your project, you should keep libGoogleAnalyticsServices.a in order for GA to continue working . Once done, do a build, see if everything is ok and go up to the store.
About the reason for this question that Apple asks before uploading your product is that iAd has a feature to identify devices, which implies the privacy of the user. So Apple only allows you to use this feature for apps that actually use iAd to track content (such as media, banners, etc.) without inflicting the privacy rules that you as a developer have committed not to break:)
I hope it helps.