Deduplicate steam

hosts/cap-slim7/configuration.nix

@@ -8,6 +8,7 @@
   imports = [
     # Include the results of the hardware scan.
     ./hardware-configuration.nix
+    ../../modules/application-groups/gaming.nix
   ];
 
   #boot.kernelPackages = pkgs.linuxPackages_latest;
@@ -393,13 +394,6 @@
     ];
   };
 
-  programs.steam = {
-    enable = true;
-    remotePlay.openFirewall = true;
-    dedicatedServer.openFirewall = true;
-    gamescopeSession.enable = true;
-  };
-
   # Some programs need SUID wrappers, can be configured further or are
   # started in user sessions.
   # programs.mtr.enable = true;