I believe you meant "processed logs". Kloxo will move old logs processed for statistics and quota enforcement to the user home dir under __processed_stats. These can add up fast depending on the site traffic.
To disable it go to the panel, list the domains and for each click in "Stats Configuration" button. To remove these logs, click "Domain defaults" button.
If you meant system logs, you should reconsider it. Kloxo uses many of these for things like brute-force attack protection (web, ftp, mail and ssh access logs combined) and traffic quota enforcement.