Merge pull request #312863 from Mic92/netboot

netboot: drop syslinux and grub (10% savings for nixos-anywhere images)

nixos/modules/installer/netboot/netboot.nix

@@ -37,11 +37,6 @@ with lib;
     # here and it causes a cyclic dependency.
     boot.loader.grub.enable = false;
 
-    # !!! Hack - attributes expected by other modules.
-    environment.systemPackages = [ pkgs.grub2_efi ]
-      ++ (lib.optionals (lib.meta.availableOn pkgs.stdenv.hostPlatform pkgs.syslinux)
-        [pkgs.grub2 pkgs.syslinux]);
-
     fileSystems."/" = mkImageMediaOverride
       { fsType = "tmpfs";
         options = [ "mode=0755" ];