You can uninstall or removes an installed google-cloud-print-connector package itself from Ubuntu 16.04 LTS (Xenial Xerus) through the terminal,
$ sudo apt-get remove google-cloud-print-connector
If you would like to remove google-cloud-print-connector and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove google-cloud-print-connector
If you use with purge options to google-cloud-print-connector package all the configuration and dependent packages will be removed.
$ sudo apt-get purge google-cloud-print-connector
If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.
$ sudo apt-get purge --auto-remove google-cloud-print-connector