I was working on my spaces and zones, and wanted to do a zone summary schedule. Moving along at my normal pace, I created the schedule and noticed the default zone was still listed. I posted this as a defect, but then got a suggestion from one of the Autodesk folks - use a filter...duh...should have known that one.
I edited the schedule, and set the filter for Name, and then told it to include zones that did not contain the word Default. Bang - no "default" zone in my schedule.
Sometimes you can't see the forest for the trees...
later - David B.