Removes the retouch_binaries and undo_retouch_binaries from updater;
newly generated OTA packages should not call them any more.
Note that applypatch retains the ability to unretouch a file as it
reads it. This will be needed as long as we want to support OTAs from
devices that were installed with retouching.
Change-Id: Ib3f6baeae90c84ba85983f626d821ab7e436ceb2
35a35a6766