drop heroic and add discord

systems/modules/discord.nix

@@ -0,0 +1,8 @@
+{ config, pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    discord
+  ];
+}
+

systems/modules/gaming.nix

@@ -14,7 +14,6 @@
   };
 
   environment.systemPackages = [
-    pkgs.heroic
     pkgs.mangohud
   ];
 }