If you want to disable your log file, select the "Disable activity logs" option from the "General" tab and press the "Next" button. If logging has been disabled, select "Enable logging" if you want to resume logging.
You can also disable your error log by clicking the "Disable Error Log" button. If your error logs are already disabled, the "Enable Error log" button will be present.
Your server logs can become large and count against your domain's disk quota. Disabling your logs will save disk space.