Remove bzip2 code since it is no longer being used.

chrome/common/bzip2_error_handler.cc

Index: chrome/common/bzip2_error_handler.cc
===================================================================
--- chrome/common/bzip2_error_handler.cc	(revision 199288)
+++ chrome/common/bzip2_error_handler.cc	(working copy)
@@ -1,14 +0,0 @@
-// Copyright (c) 2011 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 <ostream>
-
-#include "base/logging.h"
-
-// We define BZ_NO_STDIO in third_party/bzip2 to remove its internal STDERR
-// error reporting.  This requires us to export our own error handler.
-extern "C"
-void bz_internal_error(int errcode) {
-  LOG(FATAL) << "bzip2 internal error: " << errcode;
-}