Right now, there isn’t a way to delete all alternates in one fell swoop; I’m sorry about that. However, you are not the first person to ask about that, so it may be time for us to think about how we would implement it. I’ll talk to the team and see if it’s something we are ready to put on the roadmap.
I really appreciate you taking the time to post today. While I wish I had a better answer for you now, your post gives us the nudge that will help us have a better answer in the future.