fix(niri): fractional scaling

This works in latest unstable niri

modules/desktop/wm/niri/config.nix

@@ -5,20 +5,6 @@
   ...
 }:
 {
-  my.home.systemd.user.services.xwayland-satellite = {
-    Unit = {
-      Description = "xwayland-satellite";
-      After = [ "niri.service" ];
-    };
-    Service = {
-      ExecStart = "${lib.getExe pkgs.xwayland-satellite-unstable}";
-      Restart = "on-failure";
-    };
-    Install.WantedBy = [
-      "niri.service"
-    ];
-  };
-
   my.home.programs.niri.settings = {
     input = {
       focus-follows-mouse = {
@@ -95,7 +81,6 @@
       XDG_CURRENT_DESKTOP = "niri";
       XDG_SESSION_DESKTOP = "niri";
       QT_AUTO_SCREEN_SCALE_FACTOR = "1";
-      DISPLAY = ":0";
     };
 
     spawn-at-startup = map (c: { command = c; }) [