packaging: setup: removing default storage type question

Reviewing it, we found that the question is superfluous since
almost all the user will choose 'shared'.

Change-Id: Ia7e1ac239b4ad37580bc7ce0863734c60efa7cf5
Bug-Url: https://bugzilla.redhat.com/1102021
Signed-off-by: Simone Tiraboschi <stirabos@redhat.com>