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/