Remixed Foxy YARB - 80mm fan + no relays

I don't use any relays on my CNC, so I removed that feature and shortened the box (now a slightly faster print, too).
Unfortunately, once I installed my LCD I didn't have enough airflow to keep the stepper drivers cool, so I added a mounting option for a spare 80mm fan I had around. I remodelled the lid to solve this.
I have also included a solid lid for those who just want to use the original 40mm fan options