yarn: declarative lact config

hosts/yarn/default.nix

@@ -13,6 +13,7 @@
     ../../modules/no-rgb.nix
     ./disk.nix
     ./impermanence.nix
+    ./lact.nix
     ./vr.nix
 
     inputs.impermanence.nixosModules.impermanence
@@ -72,15 +73,7 @@
     localNetworkGameTransfers.openFirewall = true;
   };
 
-  # LACT (Linux AMDGPU Configuration Tool): https://github.com/ilya-zlobintsev/LACT
-  environment.systemPackages = with pkgs; [
-    lact
-    jovian-stubs
-  ];
-  systemd.packages = with pkgs; [ lact ];
-  systemd.services.lactd.wantedBy = [ "multi-user.target" ];
-
-  systemd.services.lactd.serviceConfig.ExecStartPre = "${lib.getExe pkgs.bash} -c \"sleep 3s\"";
+  environment.systemPackages = [ pkgs.jovian-stubs ];
 
   # yarn is not a Steam Deck
   jovian.devices.steamdeck.enable = false;