http: don't write error to socket

The state of the connection is unknown at this point and
writing to it can corrupt client state before it is aware
of an error.

lib/_http_server.js

@@ -604,25 +604,12 @@ function onParserTimeout(server, socket) {
 }
 
 const noop = () => {};
-const badRequestResponse = Buffer.from(
-  `HTTP/1.1 400 ${STATUS_CODES[400]}${CRLF}` +
-  `Connection: close${CRLF}${CRLF}`, 'ascii'
-);
-const requestHeaderFieldsTooLargeResponse = Buffer.from(
-  `HTTP/1.1 431 ${STATUS_CODES[431]}${CRLF}` +
-  `Connection: close${CRLF}${CRLF}`, 'ascii'
-);
 function socketOnError(e) {
   // Ignore further errors
   this.removeListener('error', socketOnError);
   this.on('error', noop);
 
   if (!this.server.emit('clientError', e, this)) {
-    if (this.writable) {
-      const response = e.code === 'HPE_HEADER_OVERFLOW' ?
-        requestHeaderFieldsTooLargeResponse : badRequestResponse;
-      this.write(response);
-    }
     this.destroy(e);
   }
 }