You may already know that how to uninstall CSF. I am giving the uninstall command again here.
cd /etc/csf sh uninstall.sh
But, what the problem after uninstall is the lfd down email alert !
You will receive regular email alert about the service lfd down. Because csf is not completely removed yet.
So, manually remove the csf completely by entering the below command.
rm -rf /usr/local/cpanel/whostmgr/docroot/cgi/configserver
You will not receive the lfd down email notification anymore.