@foone If it can be a network printer instead of USB, it's pretty easy to do, PCL uses port 9100 to send the print job, it's possible to just have some software listen locally (or remotely) to that port, accept the data, and just discard it.
I've done that in the past with a generic LaserJet PCL driver, both to discard unwanted print jobs that would never clear until successful, or capture it for data extraction.