You can uninstall or removes an installed ipheth-utils package itself from Debian 9 (Stretch) through the terminal,
$ sudo apt-get remove ipheth-utils
If you would like to remove ipheth-utils and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove ipheth-utils
If you use with purge options to ipheth-utils package all the configuration and dependent packages will be removed.
$ sudo apt-get purge ipheth-utils
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 ipheth-utils