feat: switch to sddm hidpi instead of custom scaling

modules/features/sddm.nix

@@ -1,40 +1,19 @@
 {
   flake.modules.nixos.sddm =
     {
-      config,
-      lib,
       pkgs,
       ...
     }:
-    let
-      primaryDisplays = builtins.filter (display: display.primary or false) (builtins.attrValues config.meta.host.displays);
-      primaryDisplay = if primaryDisplays == [ ] then null else builtins.head primaryDisplays;
-      primaryScale =
-        if primaryDisplay == null then
-          null
-        else
-          primaryDisplay.scale;
-      greeterEnvironment =
-        lib.optional (primaryScale != null) "QT_SCALE_FACTOR=${toString primaryScale}";
-    in
     {
       services.displayManager.sddm = {
         enable = true;
-        enableHidpi = primaryScale == null;
+        enableHidpi = true;
         wayland.enable = true;
         wayland.compositor = "kwin";
         theme = "${pkgs.sddm-astronaut}/share/sddm/themes/sddm-astronaut-theme";
         extraPackages = with pkgs; [
           kdePackages.qtmultimedia
         ];
-        settings = lib.optionalAttrs (greeterEnvironment != [ ]) {
-          General.GreeterEnvironment = lib.concatStringsSep "," (
-            [
-              "QT_WAYLAND_SHELL_INTEGRATION=layer-shell"
-            ]
-            ++ greeterEnvironment
-          );
-        };
       };
     };
 }