How to FireWall disable at RedHat 7.x, CentOS 7.x

Becasue of some firewalls are allready running in your Network, The Firewall on the server is not necessarry use.

# systemctl stop firewalld
# systemctl disable firewalld
rm '/etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service'
rm '/etc/systemd/system/basic.target.wants/firewalld.service'