This is my first Contrib, so be kind!
It struck me that having an address book, where customers could buy the product with one address and send it to another address allowed people to use stolen credit cards. The goods can be sent to them, whilst using the address associated with the credit card to allow the credit card to be processed. So I made this contrib to allow this feature to be removed to aid in fraud protection. It is unlikely that you have modified these files so you can just overwrite your stock os files. If you have made modifications to these files, use a comparison tool to make the changes.
BACKUP YOUR FILES FIRST!!