chore: apply generic updates

configs/nixos/modules/desktop/apps/steam.nix

@@ -5,13 +5,10 @@
   ...
 }:
 # Steam game launcher and runtime integration.
-let
-  cfg = config.modules.desktop.apps.steam; # NOLINT(let_order)
-in
 {
   options.modules.desktop.apps.steam.enable = lib.mkEnableOption "Steam game launcher";
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.modules.desktop.apps.steam.enable {
     programs.gamemode.enable = true;
 
     programs.steam = {