Can someone explain the purpose of the blue head and shoulders icon that appears at the top of my phone when it is locked and on the pull-down menu for quick settings? On my wife's N5, this icon allows you to switch between user accounts on the phone. Originally, tapping this on my Moto G showed a Contacts entry of my own contact info. I've since deleted that contact, and now when I tap the icon, the phone tells me "The contact doesn't exist."
Ideally, I'd like to prevent this icon from showing up, as I have no intention of using more than one account. As a consolation prize, I'd settle for knowing what is the purpose of a quick-access icon that shows you your own contact information?

Ideally, I'd like to prevent this icon from showing up, as I have no intention of using more than one account. As a consolation prize, I'd settle for knowing what is the purpose of a quick-access icon that shows you your own contact information?
