There is no actual steps to uninstall. If you want to live the original FOP as it was and if you changed FOP port, edit /var/www/html/panel/op_server.cfg and set the listen_port back to 4445.
Then stop fop2 and remove its init command, run the commands:
service fop2 stop
chkconfig --del fop2
That will stop frop2 and prevent it from starting at boot.
