I've just gotten the warning "You are approaching the limit on the number of lists you can have on a board. Please remove any lists which are unnecessary." This is on a board where I have ballpark 1,000 archived lists and 5 unarchived lists. I've deleted all archived cards, but the lists the cards were on remain in the archive. From what I can tell, there is no way to delete them. So when the warning says to "remove" them, what does it expect me to do? It's obviously not going to be a scalable solution for me to unarchive 1,000 lists and move them to some kind of Archived Lists board, and my preference is not to have to abandon this board and create a new one.