Removes:
 * instsetoo_native/util/update.xml
      - gen_update_info.pl can be removed ?

      On Windows the binary artifacts are created now in:
      workdir/*/installation/LibreOffice_Dev/native/install/en-US/*.msi

Change-Id: I1c82ea9cb9d297cdd0e4f4b9b44606259eeeed49
Reviewed-on: https://gerrit.libreoffice.org/2242Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: David Ostrovsky <David.Ostrovsky@gmx.de>
Tested-by: David Ostrovsky <David.Ostrovsky@gmx.de>