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

enterprise/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.
-# ========================================================================
-
-# To build an ADM file:
-#  1) Add a file containing the apps definition (e.g. APPS in public_apps.py).
-#  2) Import that file below.
-#  3) Add a call to the following at the end of this file:
-#       build_group_policy_template.BuildGroupPolicyTemplate(
-#           env, '$STAGING_DIR/Omaha.adm', public_apps.APPS, 'public_apps.py')
-
-from enterprise import build_group_policy_template
-
-Import('env')
-
-env.BuildSConscript('installer')