Keep only base/extractor.[cc|h].

tools/ReadTag/build.scons

-#!/usr/bin/python2.4
-#
-# Copyright 2009-2010 Google Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-# ========================================================================
-
-
-Import('env')
-
-
-local_env = env.Clone()
-local_env.Append(
-    LIBS = [
-        ('atls.lib', 'atlsd.lib')[local_env.Bit('debug')],
-        ('libcmt.lib', 'libcmtd.lib')[local_env.Bit('debug')],
-        ('libcpmt.lib', 'libcpmtd.lib')[local_env.Bit('debug')],
-        'netapi32.lib',
-        'psapi.lib',
-        'rasapi32.lib',
-        'shlwapi.lib',
-        'userenv.lib',
-        'version.lib',
-        'wtsapi32.lib',
-
-        '$LIB_DIR/common.lib',
-        ],
-    CPPDEFINES = [
-        'UNICODE',
-        '_UNICODE'
-        ],
-)
-
-local_env.FilterOut(LINKFLAGS = ['/SUBSYSTEM:WINDOWS'])
-local_env['LINKFLAGS'] += ['/SUBSYSTEM:CONSOLE']
-
-target_name = 'ReadTag'
-
-inputs = [
-    'read_tag.cc',
-    ]
-if env.Bit('use_precompiled_headers'):
-  inputs += local_env.EnablePrecompile(target_name)
-
-local_env.ComponentTestProgram(
-    prog_name=target_name,
-    source=inputs,
-    COMPONENT_TEST_RUNNABLE=False
-)