http: remove duplicate code

This line of code has been implemented in the prepareError function.

PR-URL: #39239
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>

lib/_http_server.js

@@ -690,7 +690,6 @@ function onParserExecuteCommon(server, socket, parser, state, ret, d) {
 
   if (ret instanceof Error) {
     prepareError(ret, parser, d);
-    ret.rawPacket = d || parser.getCurrentBuffer();
     debug('parse error', ret);
     socketOnError.call(socket, ret);
   } else if (parser.incoming && parser.incoming.upgrade) {