wasm: fix crash when getting error like 404

Pick-to: 5.15
Change-Id: Ia9b81aaa8b1e9ea6ab20b8c6ff6f197e95d46d7d
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>

src/network/access/qnetworkreplywasmimpl.cpp

@@ -282,7 +282,6 @@ void QNetworkReplyWasmImplPrivate::emitReplyError(QNetworkReply::NetworkError er
 
     q->setError(errorCode, errorString);
     emit q->errorOccurred(errorCode);
-    doAbort();
     m_fetch = 0;
     q->close();
 }