To remove your items from Facebook, you need to go into Orders or Manage Inventory, select the items you would like removed, scroll to the bottom of the page and select "Delete Selected Photos from Facebook". Scroll down and which group and album you would like your items removed from and click "Yes, delete Facebook photos for selected".
Note 1 - Items that were sold are no longer available in your inventory.
Note 2 - We considered having them automatically removed from Facebook once they were claimed, but we took a poll and the majority of users wanted them left up to create excitement and to show customers what they were missing.