That’s a great idea! I’m afraid that isn’t a setting currently supported in the plugin, but I do see an open feature request for that that could use more votes. Will you please add your vote to it — that will help keep the idea on the radar as we add new ideas to upcoming releases.
Sorry for the bad news, but does this help answer your question? Please let me know.
I see the open feature request, which I created, but in the meantime do you happen to know which file this option resides in?
I could then just edit the line of code not to display the RSVP option.
We will soon be training quite a few administrators on how to use the system and removing unused options has the potential to make the learning process slightly easier.