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

recovery/repair_exe/custom_action/executecustomaction.def

-; Copyright 2007-2009 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.
-; ========================================================================
-
-LIBRARY      "executecustomaction.dll"
-
-EXPORTS
-  VerifyFileAndExecute