fixup! disturbed is already true at start of pipeTo

Author: MattiasBuelens

lib/internal/webstreams/readablestream.js

@@ -1551,7 +1551,6 @@ function readableStreamPipeTo(
       while (controller[kState].queue.length > 0) {
         if (shuttingDown) return true;
 
-        source[kState].disturbed = true;
         const chunk = dequeueValue(controller);
 
         if (controller[kState].closeRequested && !controller[kState].queue.length) {