Hi Fran,
WordPress’s RSS feeds include the author field by default – it’s not something we add or generate on our side.
I’m afraid to say, it’s easier to add new elements that to strip out certain hardcoded existing elements – making removal of the author field a fairly advanced customization.
Also, can I add the event description (if there is one)?
This is included as standard 🙂
When I visit your site I don’t see any events with descriptions, though, which is probably why they are currently absent from the feed.
I hope that helps!