CJV30-160 new to me.. help with white and silver delete

Little background to start,, My company puchased this printer around 6 years ago. It was never used much although it was always plugged in.

The Mimaki is currently set up for cmyk with lm lc white and silver. I'm looking to abandon the white and silver as we don't need it as I also have a summa thermal transfer.

How hard is it to delete the white and silver? If we have to lose lm and lc thats fine. With ink prices so high it seems crazy to purchase white and silver for it to only expire again and again..

Please help!