refactor(unfree): move the unfree setting to the settings module

modules/nixos/settings.nix

@@ -32,10 +32,11 @@
     };
   };
 
+  # allow unfree packages (steam, protonvpn, discord, etc.)
+  nixpkgs.config.allowUnfree = true;
+
   # links /libexec from derivations to /run/current-system/sw
   environment.pathsToLink = [ "/libexec" ];
-  # set the default editor to vim
-  environment.variables.EDITOR = "vim";
 
   # enable home-manager globally
   home-manager.useGlobalPkgs = true;

modules/nixos/steam.nix

@@ -1,9 +1,6 @@
 { config, lib, pkgs, ... }:
 
 {
-  # allow unfree to install steam
-  nixpkgs.config.allowUnfree = true;
-
   # enable steam and open firewall
   programs.steam = {
     enable = true;