Revert "promptfoo: fix build with nodejs_24"

This reverts commit 324aa4ea21.
promptfoo now builds fine with nodejs_24.

pkgs/by-name/pr/promptfoo/package.nix

@@ -1,6 +1,5 @@
 {
   buildNpmPackage,
-  nodejs_22,
   fetchFromGitHub,
   lib,
 }:
@@ -18,9 +17,6 @@ buildNpmPackage (finalAttrs: {
 
   npmDepsHash = "sha256-mpe00J5iRwaH7hJIDP3fDuJSUOKk01COpOOvF1YJMyg=";
 
-  # https://github.com/NixOS/nixpkgs/issues/474535
-  nodejs = nodejs_22;
-
   # don't fetch playwright binary
   env.PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD = "1";