fix: remove star-citizen, it's not building

Author: kid

systems/x86_64-nixos/vulkan/default.nix

@@ -3,7 +3,6 @@
   lib,
   inputs,
   modulesPath,
-  inputs',
   pkgs,
   ...
 }:
@@ -47,13 +46,6 @@
       incus.enable = true;
       qemu.enable = true;
     };
-
-    packages = {
-      inherit (pkgs) go;
-      star-citizen = inputs'.nix-gaming.packages.star-citizen.override (_: {
-        useUmu = true;
-      });
-    };
   };
 
   boot = {