Bug#890505: gnome-software does not support uninstallation of unused dependencies

[asciiwolf at seznam.cz]

Package: gnome-software
Version: 3.26.5-1

When uninstalling a package using GNOME Software on Debian/Ubuntu, only the package itself is removed, not any of its (now unused) dependencies. This is because the aptcc PackageKit backend used by GNOME Software in Debian/Ubuntu does not support[1] uninstallation of unused dependencies. This causes a big problem for regular users as there is currently not any user-friendly way to uninstall the unused packages. Please, consider fixing this.

[1] https://github.com/hughsie/PackageKit/issues/201