There is a simple way to remove a device from your computer. Firstly, disconnect all the printers from the PC. Once the devices are no longer attached to PC, go to Start > Run > devmgmt.msc. Expand Printers category and right click the one you want to remove. Choose Uninstall driver and tick the box to delete the software as well. Reboot the PC and you'll have only the printer that's wasn't uninstalled.