move gnome settings into other file

configuration.nix

@@ -16,6 +16,7 @@
   imports = [ 
     ./modules/networking.nix 
     ./modules/nix-settings.nix
+    ./modules/gnome.nix 
   ];
 
   # Set your time zone.
@@ -50,55 +51,8 @@
     };
   };  
 
-  # Enable the X11 windowing system.
-  services.xserver = {
-    enable = true;
-    # enable = false;
-    xkb = {
-      layout = "us";
-      variant = "";
-      options = "caps_lock:esc";
-    };
-    # videoDrivers = [
-    #                  "displaylink" # broken
-    #                  "modesetting" 
-    #                ];
-    # Enable the GNOME Desktop Environment.
-    desktopManager = {
-      xterm.enable = false;
-      gnome.enable = true;
-     #  xfce = {
-     #    enable = true;
-     #    # noDesktop = true;
-     #    enableXfwm = false;
-     #  };
-      # plasma6.enable = true;
-    };
-    displayManager.gdm.enable = true;
-    # displayManager.defaultSession = "xfce+stumpwm";
-    # windowManager = {
-    #   stumpwm.enable = true;
-    #   # xmonad.enable = true;
-    # };
-  };
   # console.useXkbConfig = true;
   # console.keyMap = ./galvatron/keys.map;
-  environment.gnome.excludePackages = with pkgs.gnome; [
-    baobab
-    cheese
-    epiphany
-    eog
-    yelp
-    simple-scan
-    geary
-    gnome-calculator
-    gnome-calendar
-    gnome-weather
-    gnome-maps
-    gnome-contacts
-    pkgs.gnome-console
-    totem
-  ];
 
   # Enable CUPS to print documents.
   services.printing.enable = true;