Do you mean the "kiss" firewall?
First of all, turn it off:
# kiss stop
second of all remove the code that starts it. If you followed the instructions you probably added the line:
/usr/local/sbin/kiss start
to /etc/rc.d/rc.local
So remove that code.
Then you can delete kiss itself; if you followed the instructions you probably installed it at:
/usr/local/sbin/kiss
and if so you can just do:
# rm /usr/local/sbin/kiss
But it's unlikely that kiss would work and then stop httpd from working, since kiss does not include any interactive code to change itself automatically.
Jeff