Remove OpenStack from your system.

[stack@devstack-kali ~]$ cd devstack
[stack@devstack-kali ~devstack]$ ./clean.sh
[stack@devstack-kali ~devstack]$ ./unstack.sh
[stack@devstack-kali ~devstack]$ sudo rm -rf /opt/stack/
[stack@devstack-kali ~]$ sudo rm -rf devstack
[stack@devstack-kali ~]$sudo rm -rf /usr/local/bin/