qml(2)puppet: Avoid ugly logic with generating Info.plist file

The Info.plist was generated for putting the Qt Creator version into it.
Since that is not very useful nor necessary information, we can just
avoid the whole generation, and make the logic much simpler.

Change-Id: I71a12dc7e53970e3ef136e8abc78077dfba3326e
Reviewed-by: Marco Bubke <marco.bubke@digia.com>