After moving the QtDesignStudio documentation to the QtCreator
repository there is no need for these extra files in the dev
packages.
Change-Id: I4e24946bb6752403a6ecafb0c474332ad2317b1a
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>