nixos/tests/ft2-clone: cleanup

- Remove unused `config` argument
- Don't enable the xserver again, since the import `./common/x11.nix` already takes care of that
- Remove an empty line at the end

nixos/tests/ft2-clone.nix

@@ -4,12 +4,11 @@ import ./make-test-python.nix ({ pkgs, ... }: {
     maintainers = [ fgaz ];
   };
 
-  nodes.machine = { config, pkgs, ... }: {
+  nodes.machine = { pkgs, ... }: {
     imports = [
       ./common/x11.nix
     ];
 
-    services.xserver.enable = true;
     sound.enable = true;
     environment.systemPackages = [ pkgs.ft2-clone ];
   };
@@ -30,4 +29,3 @@ import ./make-test-python.nix ({ pkgs, ... }: {
       machine.screenshot("screen")
     '';
 })
-