GNOME PackageKit 3.11.1 modernizes a few Glade files, translates the AppData file, and removes the gpk-distro-upgrade, gpk-install-catalog, gpk-install-mime-type, gpk-install-package-name, gpk-install-provide-file binaries, as well as the Python helper functions.
Moreover, GNOME PackageKit 3.11.1 now uses 16:9 screenshots in the AppData files, displays the whole list in the window when showing repositories, fixes the AppData name to be less generic, no longer passes relative paths to the session interface, no longer links to UPower, no longer supports ConsoleKit, removes EggDBusMonitor, and no longer uses the DesktopDB in gpk-application, and deprecated GTK symbols.