I tried to remove a contact of a friend since he has a new email address. Few times I mistakenly sent to his old email address. But I couldn’t found where to go about to remove the old email address.
After wandering around, I found this hidden link to contact to remove a friend’s contact.
Click on the “Contact” link
Search for a contact
Click on the More > Delete contact
You are done removing a contact in your contact list.