spree/spree — pull request #4787 by jordan-brough (2014-06-04 14:30:24+00:00)
Title: drop credit_cards first_name and last_name fields

This was supposed to happen eventually: https://github.com/spree/spree/pull/2807#issuecomment-16345435
It's been causing confusion for us and some others in a couple ways so it seems like a good time to drop them.