Disable autologin for plasma

Means kwallet is unlocked at login so no issues with startup programs

system/plasma.nix

@@ -1,4 +1,4 @@
-{ pkgs, username, ... }:
+{ pkgs, ... }:
 {
   environment.plasma6.excludePackages = with pkgs.kdePackages; [
     plasma-browser-integration
@@ -6,13 +6,10 @@
     kate
   ];
   services = {
-    displayManager = {
-      autoLogin.user = username;
-      sddm = {
+    displayManager.sddm = {
       enable = true;
       wayland.enable = true;
     };
-    };
     desktopManager.plasma6 = {
       enable = true;
       enableQt5Integration = true;