We cannot silently convert user data or their used file formats
and then await them to accept it or reinstall an older version.

Let us make a soft change instead of an hard (heart) break
and avoid us to been attacked with fire and forks from our users.

This reverts commit 8d381ae8.

Change-Id: Ia153640935e355771acb85cf652f8fe4c21fafbb
Reviewed-on: https://gerrit.libreoffice.org/52731Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tamás Bunth <btomi96@gmail.com>