File postun.wallpaper of Package branding-basedonopensuse

# Note: we don't use "$1 -eq 0", to avoid issues if the package gets renamed
if [ ! -f /usr/share/wallpapers/openSUSE-default-static.xml ]; then
  update-alternatives --remove openSUSE-default.xml /usr/share/wallpapers/openSUSE-default-static.xml
fi