Deleting Printers from Directory

I have small network that does not have a print server. Instead, we have several printers that are attached to computers and the printers are shared with everyone. On two separate computers, I’ve disconnected and uninstalled the printers attached to them. However, those printers show up in the directory when users try to add a new printer. How can I remove these printers from the directory? Where are these printer objects stored when we have no server in use as a print server?