To uninstall openstack-dashboard just follow these instructions.
sudo apt-get remove openstack-dashboard
This will remove just the openstack-dashboard package itself.
sudo apt-get remove --auto-remove openstack-dashboard
This will remove the openstack-dashboard package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for openstack-dashboard then this will work.
sudo apt-get purge openstack-dashboard
Or similarly, like this openstack-dashboard
sudo apt-get purge --auto-remove openstack-dashboard
|Maintainer||PKG OpenStack <email@example.com>|
|Description||web application to control an OpenStack cloud|