I just traded in an iPhone to Verizon and reset the phone to factory settings but I think I forgot to remove the google account. Did resetting it clear it for me?
If you erased it, it should remove other account settings too. There's a list of things to do here:
What to do before selling or giving away your iPhone, iPad, or iPod touch "Use these steps to remove your personal information from a device, even if you don't have it anymore." Click here --> https://support.apple.com/HT201351