autox: Remove C++ version.

src/platform/autox/SConstruct

-# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import os
-
-env = Environment()
-for key in Split('CC CXX AR RANLIB LD NM'):
-  value = os.environ.get(key)
-  if value != None:
-    env[key] = value
-for key in Split('CFLAGS CCFLAGS CPPPATH LIBPATH'):
-  value = os.environ.get(key)
-  if value != None:
-    env[key] = Split(value)
-if not env.get('CCFLAGS'):
-  env.Append(CCFLAGS=Split('-I.. -Wall -Werror -O3'))
-
-# Fix issue with scons not passing some vars through the environment.
-for key in Split('PKG_CONFIG_LIBDIR PKG_CONFIG_PATH SYSROOT'):
-  if os.environ.has_key(key):
-    env['ENV'][key] = os.environ[key]
-
-env.Append(CPPPATH=['..'])
-env.Append(LIBS=Split('base chromeos rt Xtst'))
-env.ParseConfig('pkg-config --cflags --libs libpcrecpp x11')
-env.Program('autox', Split('autox.cc script_runner.cc'))