Since the transaction is closed, the photos can only be removed by MLS Services. The agents no longer have access to make changes to a listing once it is marked as closed. There is a form they will send to the agent that you will need to sign, showing that it this is an owner request. Once that form is completed and returned, they can remove the photos from the old listing. Please note that this will only be for the pictures on HAR and will not ensure that the pictures are removed from other syndicated websites (Realtor.com, Homes.com, etc.).