As Leedsman has pointed out, it's not an App. It's a homescreen shortcut, also know as a "web app". There is no AW app in Apples App Store, so it is not associated with your Apple ID.
Do as Frank says - press an hold it until it wiggles, then tap the X to delete it.
And next time, don't press the prompt to save it as a shorcut on your iPhone. It doesn't automatically save itself there - you have to tap the prompt to get it to.