To uninstall unattended-upgrades just follow these instructions.
sudo apt-get remove unattended-upgrades
This will remove just the unattended-upgrades package itself.
sudo apt-get remove --auto-remove unattended-upgrades
This will remove the unattended-upgrades package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for unattended-upgrades then this will work.
sudo apt-get purge unattended-upgrades
Or similarly, like this unattended-upgrades
sudo apt-get purge --auto-remove unattended-upgrades
|Maintainer||Ubuntu Developers <email@example.com>|
|Description||automatic installation of security upgrades|