I don't think this can be done. The dataset always has a fixed name and SMSQL will use it if one exists already, or create a new one if it doesn't. Removing the dataset should not remove any volumes so you can still access the snaps, but you can't then use SMSQL to restore from them.
Actually, I just tested this in my lab. What I did was just rename the existing data-set to "-old" or something and SM-SQL does not see a data-set anymore. After that I ran the "configuration wizard" and SM-SQL created a new data-set.
I agree that you will not be able to restore from the old data-set using SM-SQL, this you need to do manually. But for this is enough.