How to remove ad Mob SDK?


I can’t seem to get rid of the ad Mob SDK, since I don’t use ads in my application.
I’ve read the wiki on using ad Mob in-game, and I’ve done just the opposite of that to get rid of them
But still when I upload the app on google play console it says “We found ad SDK in your APK”.

So what must I do to remove the ad Mob SDK form my APK??

Thank you,