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

base/logging/build.scons

-#!/usr/bin/python2.4
-#
-# Copyright 2009 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')
-
-#
-# Build the googleclient port of the logging module.
-#
-logging_env = env.Clone()
-
-logging_inputs = [
-    'logging.cc',
-    ]
-
-logging_env.ComponentStaticLibrary(
-    lib_name='logging',
-    source=logging_inputs,
-)
-