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.