feat!: Disable JS iterator helpers as the feature is at Stage 3 and w…

…e should only enable by default Stage 4 features

Proposal Status as of today: https://github.com/tc39/proposal-iterator-helpers/tree/2496da582fbcc9e4a937064373d5aa8bbde05260#status

Stage definitions: https://tc39.es/process-document/

c-dependencies/js-compute-runtime/js-compute-runtime.cpp

@@ -123,7 +123,6 @@ bool init_js() {
       .setBYOBStreamReadersEnabled(true)
       .setReadableStreamPipeToEnabled(true)
       .setWritableStreamsEnabled(true)
-      .setIteratorHelpersEnabled(true)
       .setWeakRefsEnabled(JS::WeakRefSpecifier::EnabledWithoutCleanupSome);
 
   JS::DisableIncrementalGC(cx);