Adonio, This is Splunk Cloud instance. I do not think I've access to any config files except from the UI. To be specific, I did not configure any of these files and not sure where to check/delete these.
Just now observed that eventgen is configured to generate dummy data. While it is good to have sample data, it is not exactly useful in production usecase. Also the eventgen app doesn't have an option to disable from Splunk Cloud UI. I'm on Splunk cloud trail and it doesn't have an option to raise support request.