Yes, it is okay to delete Android Auto from your Android device if you do not use it or do not find it useful. Android Auto is an app that allows you to connect your Android device to your car's infotainment system and use certain features, such as navigation, music, and messaging, hands-free while driving. However, if you do not frequently use your car's infotainment system or prefer alternative methods of accessing these features, then it is perfectly acceptable to delete the app. Deleting the app will not affect the basic functionality of your Android device, and you can always reinstall it from the Google Play Store if you change your mind later.