how to remove printers from a

apart from if it's a wired printer disconnecting it from the device then

system preferences->printers & scanners marking the unwanted printer from the list and clicking the - button under the listbox

Click on small black Apple in top left of screen. On dropdown menu, select System Preferences.

Then select 'Printers & Scanners'. You will see an image a little like this:-

Use the ' - ' button to remove a printer.

I trust this helps!