modules: system: remove 'media'

It was not the idiomatic way to do this.

modules/system/default.nix

@@ -6,7 +6,6 @@
     ./boot.nix
     ./documentation.nix
     ./language.nix
-    ./media.nix
     ./nix.nix
     ./packages.nix
     ./users.nix

modules/system/media.nix

@@ -1,17 +0,0 @@
-# Abstracting away the need for a common 'media' group
-
-{ config, lib, ... }:
-let
-  mediaServices = with config.my.services; [
-    calibre-web
-    jellyfin
-    paperless
-    pirate
-    sabnzbd
-    transmission
-  ];
-  needed = builtins.any (service: service.enable) mediaServices;
-in
-{
-  config.users.groups.media = lib.mkIf needed { };
-}