How to uninstall isc-dhcp-server

To uninstall isc-dhcp-server just follow these instructions.
 Uninstall just isc-dhcp-server: sudo apt-get remove isc-dhcp-server 
This will remove just the isc-dhcp-server package itself.

 Uninstall isc-dhcp-server and it's dependencies: sudo apt-get remove --auto-remove isc-dhcp-server This will remove the isc-dhcp-server package and any other dependant packages which are no longer needed. 

Purging your config/data too If you also want to delete your local/config files for isc-dhcp-server then this will work. 
Caution! Purged config/data can not be restored by reinstalling the package.
sudo apt-get purge isc-dhcp-server 
Or similarly, like this isc-dhcp-server
sudo apt-get purge --auto-remove isc-dhcp-server