stream: remove brandchecks from stream duplexify

Refs: #46190
Refs: #46205 (comment)
PR-URL: #46315
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

lib/internal/streams/duplexify.js

@@ -8,6 +8,8 @@ const {
   isReadableNodeStream,
   isWritableNodeStream,
   isDuplexNodeStream,
+  isReadableStream,
+  isWritableStream,
 } = require('internal/streams/utils');
 const eos = require('internal/streams/end-of-stream');
 const {
@@ -33,16 +35,6 @@ const {
   FunctionPrototypeCall
 } = primordials;
 
-
-const {
-  isBrandCheck,
-} = require('internal/webstreams/util');
-
-const isReadableStream =
-  isBrandCheck('ReadableStream');
-const isWritableStream =
-  isBrandCheck('WritableStream');
-
 // This is needed for pre node 17.
 class Duplexify extends Duplex {
   constructor(options) {