This post explains the steps to remove network printers on a Linux Server.
1. Verify if Printer exists:
# lpstat -p
2. Modify /etc/hosts and remove printer details:
# vi /etc/hosts
3. Remove printer in the server:
# sudo lpadmin -x [printer name]
4. Verify if printer has been successfully removed:
# lpstat -p | grep [printer name]
or
# ping [printer name]
Note: Do not modify /etc/cups/printers.conf configuration file directly. Use the lpadmin command to add or remove printers.