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

setup/build.scons

-# Copyright 2008-2009 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')
-
-local_env = env.Clone()
-
-inputs = [
-    'setup.cc',
-    'setup_files.cc',
-    'setup_google_update.cc',
-    'setup_metrics.cc',
-    ]
-
-# Need to look in output dir to find .h files generated by midl compiler.
-# This also allows Hammer to understand dependencies between this subdir
-# and the .idl files in the goopdate folder.
-# TODO(omaha): It would be nice to eliminate references to COM files from setup.
-local_env['CPPPATH'] += ['$OBJ_ROOT']
-
-
-# Build these into a static library.
-local_env.ComponentStaticLibrary('setup', inputs)