tests/ldap: remove redundant settings

All of thsese are already option defaults.

tests/ldap.nix

@@ -11,17 +11,10 @@ in
       { pkgs, ... }:
       {
         imports = [
-          ./../default.nix
+          ../default.nix
           ./lib/config.nix
         ];
 
-        virtualisation.memorySize = 1024;
-
-        services.openssh = {
-          enable = true;
-          settings.PermitRootLogin = "yes";
-        };
-
         environment.systemPackages = [
           (pkgs.writeScriptBin "mail-check" ''
             ${pkgs.python3}/bin/python ${../scripts/mail-check.py} $@
@@ -116,11 +109,6 @@ in
           forwards = {
             "bob_fw@example.com" = "bob@example.com";
           };
-
-          vmailGroupName = "vmail";
-          vmailUID = 5000;
-
-          enableImap = false;
         };
       };
   };