chore: remove last sddm remains (#215)

Author: renner0e

README.md

@@ -11,7 +11,7 @@ This repo builds on top of:
 - `system_files/dx/` - Aurora-DX specific configuration
 - `wallpapers/` - Aurora wallpapers from [artwork repo](https://github.com/ublue-os/artwork)
 - `system_files/shared/usr/share/ublue-os/homebrew/` - Flatpak definitions used for including flatpaks for the ISOs and `ujust install-system-flatpaks` - [Yes, homebrew supports the installation of Flatpaks](https://github.com/Homebrew/brew/pull/21097)
-- `logos/` - Aurora Logos used in SDDM/Plasma Kickoff etc.
+- `logos/` - Aurora Logos used in PLM/Plasma Kickoff etc.
 
 Related work is on the [Fedora KDE-SIG](https://forge.fedoraproject.org/kde)