Hey jussibr,
Thanks for reaching out to us!
You can follow our themer’s guide to copy the community-events/src/views/event-list.php file into your theme and customizing the result there.
However, based on what you’re looking to control here (the sidebar) this might not be the best approach.
All of our calendar views utilize the template settings defined within the Events > Settings > Display tab within your settings. So, if you have it set to a template that would include that sidebar there, then that is what the event list will display with.
You could get around this though with some custom development on your associated template. However, this would vary depending on your current theme and how the templates are built there.
I’m sorry I wasn’t able to give you a direct answer here but hopefully this will help to get you pointed in the right direction.
Thanks!