stream: remove no longer necessary ComposeDuplex

PR-URL: #40545
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

Author: ronag

lib/internal/streams/compose.js

@@ -16,28 +16,6 @@ const {
 },
 }=require('internal/errors');
 
-// This is needed for pre node 17.
-classComposeDuplexextendsDuplex{
-constructor(options){
-super(options);
-
-// https://github.com/nodejs/node/pull/34385
-
-if(options?.readable===false){
-this._readableState.readable=false;
-this._readableState.ended=true;
-this._readableState.endEmitted=true;
-}
-
-if(options?.writable===false){
-this._writableState.writable=false;
-this._writableState.ending=true;
-this._writableState.ended=true;
-this._writableState.finished=true;
-}
-}
-}
-
 module.exports=functioncompose(...streams){
 if(streams.length===0){
 thrownewERR_MISSING_ARGS('streams');
@@ -107,7 +85,7 @@ module.exports = function compose(...streams) {
 // TODO(ronag): Avoid double buffering.
 // Implement Writable/Readable/Duplex traits.
 // See, https://github.com/nodejs/node/pull/33515.
-d=newComposeDuplex({
+d=newDuplex({
 // TODO (ronag): highWaterMark?
 writableObjectMode: !!head?.writableObjectMode,
 readableObjectMode: !!tail?.writableObjectMode,