drop grub when exporting a tarball

[npf]

more generally: could we remove some packages depending on the export format ?

[mickours]

You can add a step that clean the recipe before export if you are using the kameleon hook: on_setup_clean

An other way to do this is to create a clean script and modify export_appliance.py to execute your script regarding the export format. But be careful, you have export VM disk before cleaning and export tarballs.