Remove now unused Balsa code.

net/tools/quic/test_tools/simple_client.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "net/tools/quic/test_tools/simple_client.h"
-
-#include "net/tools/balsa/balsa_headers.h"
-
-namespace net {
-namespace test {
-
-void SimpleClient::WaitForResponse() {
-  WaitForResponseForMs(-1);
-}
-
-// Waits for some data or response from the server.
-void SimpleClient::WaitForInitialResponse() {
-  WaitForInitialResponseForMs(-1);
-}
-
-void SimpleClient::WaitForResponseForMs(int timeout_ms) {
-  WaitUntil(timeout_ms, [this]() { return response_complete(); });
-  if (response_complete()) {
-    VLOG(1) << "Client received response:" << response_headers()->DebugString()
-            << response_body();
-  }
-}
-
-void SimpleClient::WaitForInitialResponseForMs(int timeout_ms) {
-  WaitUntil(timeout_ms, [this]() { return response_size() != 0; });
-}
-
-int SimpleClient::ResetSocket() {
-  LOG(FATAL) << "SimpleClient::ResetSocket is not implemented";
-  return 0;
-}
-
-int SimpleClient::HalfClose() {
-  LOG(FATAL) << "SimpleClient::HalfClose is not implemented";
-  return 0;
-}
-
-int SimpleClient::response_header_size() const {
-  return 0;
-}
-
-int64_t SimpleClient::response_body_size() const {
-  return 0;
-}
-
-}  // namespace net
-}  // namespace test