How to completely remove / uninstall / purge kubuntu-desktop (KDE) from ubuntu

1. Uninstall
   

   $ sudo aptitude purge kubuntu-desktop plasma-desktop
   

2. Remove .kde
   

   $ rm -rf ~/.kde
   

3. Remove lightdm config file
   

   $ rm -f /usr/share/lightdm/lightdm.conf.d/40-kde-plasma-kf5.conf
   

4. Remove xsessions file
   

   $ rm -f /usr/share/xsessions/plasma.desktop
   

5. Most important step, Uninstall sddm
   

   $ sudo aptitude purge sddm sddm-theme-breeze