fixup: nit

Author: ronag

lib/internal/streams/end-of-stream.js

@@ -87,7 +87,6 @@ function eos(stream, opts, callback) {
   };
 
   const onclose = () => {
-    let err;
     if (readable && !readableEnded) {
       if (!isReadableEnded(stream))
         return callback.call(stream, new ERR_STREAM_PREMATURE_CLOSE());
@@ -96,7 +95,7 @@ function eos(stream, opts, callback) {
       if (!isWritableFinished(stream))
         return callback.call(stream, new ERR_STREAM_PREMATURE_CLOSE());
     }
-    callback.call(stream, err);
+    callback.call(stream);
   };
 
   const onrequest = () => {