It recently got harder to remove yourself entirely from a Facebook event (not just declining/joining the not going-party. There used to be a link "remove from my events" or something similar on the event page but it seems to have disappeared. Instead, you have to
- decline the event
- click on one of the going/maybe/invited labels in the left menu
- select declined from the list
- find yourself and press the cross to remove yourself from the event
I posted this here because I couldn't find a good guide on the web but managed to find out how to do it anyway. Hopefully, it will help some of you people out there.