Remove old lutris and steam nix files

home-manager/lutris.nix

@@ -1,20 +0,0 @@
-{ pkgs, ... }:
-{
-  home.packages = with pkgs; [
-    ( lutris.override {
-      extraLibraries = pkgs: [
-        wine
-        xorg.libXcursor
-        xorg.libXi
-        xorg.libXinerama
-        xorg.libXScrnSaver
-        libpng
-        libpulseaudio
-        libvorbis
-        stdenv.cc.cc.lib
-        libkrb5
-        keyutils
-      ];
-    })
-  ];
-}

nixos/includes/gaming/steam.nix

@@ -1,7 +0,0 @@
-{ pkgs, ... }:
-{
-  programs.steam = {
-    enable = true;
-    gamescopeSession.enable = true;
-  };
-}