upaded to recommened confs, remove nvtop

configuration.nix

@@ -72,22 +72,23 @@
   services.xserver.enable = true;
 
   # Enable the KDE Plasma Desktop Environment.
-  services.xserver.displayManager.sddm.enable = true;
+  services.displayManager.sddm.enable = true;
   services.xserver.desktopManager.plasma5.enable = true;
 
 
   # Configure keymap in X11
   services.xserver = {
-    layout = "de";
-    xkbVariant = "";
+    xkb.layout = "de";
+    xkb.variant = "";
   };
 
+
   # Configure console keymap
   console.keyMap = "de";
 
 
   # Enable sound with pipewire.
-  sound.enable = true;
+  #sound.enable = true;
   hardware.pulseaudio.enable = false;
   security.rtkit.enable = true;
   services.pipewire = {
@@ -121,7 +122,6 @@
   usbutils
   pciutils
   netcat
-  nvtop
   lm_sensors
 
   # Media