Thanks for this thread. I used it to override / remove the default No-print areas on Cura from initial set up.
I added the following to my printer's .inst.cfg file:
machine_disallowed_areas = [
[[ -117.5, -117.5 ], [ -117, -117.5 ], [ -117, -117 ], [ -117.5, -117 ]]]
which added a very small no-print area at the very bottom left corner, and wiped the annoying default no-print areas.