Deleting multiple Groups, or 1-group only Board Duplication option

I sometimes have to duplicate a board that has lots of groups in it (e.g. a group for each week of the year), but duplicating a board the barest option available is “Structure Only,” where “Structure” includes all the columns and all the groups. So then I have to delete all the groups… one-by-one.

Is there either a way to delete multiple groups all at once? Alternatively, could there be added a board duplication option that would be “Column Structure Only” or “1 Group”?

I’m also looking for a way to delete multiple groups at one time. I haven’t found a solution yet.