[Desktop] remove Plasma 5

desktop/plasma/default.nix

@@ -6,7 +6,6 @@ let
 in {
 
   imports = [
-    ./plasma5.nix
     ./plasma6.nix
   ];
 

desktop/plasma/plasma5.nix

@@ -1,29 +0,0 @@
-{ config, pkgs, lib, ... }:
-with lib;
-let
-  cfg = config.aviallon.desktop;
-  generic = import ./generic.nix {
-    kdePackages = pkgs.libsForQt5;
-  };
-in {
-  config = mkIf (cfg.enable && (cfg.environment == "plasma")) {
-    # Enable the Plasma 5 Desktop Environment.
-    services.xserver.desktopManager.plasma5 = {
-      enable = true;
-      runUsingSystemd = true;
-      useQtScaling = true;
-
-      # Removed in: https://github.com/NixOS/nixpkgs/pull/172078
-      # and: https://github.com/NixOS/nixpkgs/pull/221721
-      # Once this (https://invent.kde.org/plasma/powerdevil/-/issues/19) is solved, make PR to add it back (prehaps by default?)
-      # supportDDC = true;
-    };
-
-    environment.systemPackages = generic.commonPackages ++ [
-      pkgs.kio-fuse
-    ];
-
-    # We prefer Plasma Wayland
-    services.displayManager.defaultSession = "plasmawayland";
-  };
-}