nixos/tests/tandoor-recipes: use SQLite

This is a work-around for getting the tests working until NixOS#216989 is
fixed.

nixos/tests/tandoor-recipes.nix

@@ -3,33 +3,8 @@ import ./make-test-python.nix ({ lib, ... }: {
   meta.maintainers = with lib.maintainers; [ ambroisie ];
 
   nodes.machine = { pkgs, ... }: {
-    # Setup using Postgres
     services.tandoor-recipes = {
       enable = true;
-
-      extraConfig = {
-        DB_ENGINE = "django.db.backends.postgresql";
-        POSTGRES_HOST = "/run/postgresql";
-        POSTGRES_USER = "tandoor_recipes";
-        POSTGRES_DB = "tandoor_recipes";
-      };
-    };
-
-    services.postgresql = {
-      enable = true;
-      ensureDatabases = [ "tandoor_recipes" ];
-      ensureUsers = [
-        {
-          name = "tandoor_recipes";
-          ensurePermissions."DATABASE tandoor_recipes" = "ALL PRIVILEGES";
-        }
-      ];
-    };
-
-    systemd.services = {
-      tandoor-recipes = {
-        after = [ "postgresql.service" ];
-      };
     };
   };