dashboard: remove useless block section
dashboard: remove useless block section

The block section were used with the dashboard_enabled condition when
the code was included in the main playbooks.
Because this condition isn't present in the dashboard playbook anymore
we can remove the block section.

Signed-off-by: Dimitri Savineau <a50a620e679eed14f4e99998b821cea8884cf228@redhat.com>

ceph/ceph-ansible,ceph/ceph-ansible