RBD: Remove dead code
RBD: Remove dead code

during volume creation we are validating
that volume name cannot be empty,removing
this check as we are not going to hit
this case

Fixes: #204

Signed-off-by: Madhu Rajanna <3fd386a97c670d1e91c848dbf4b2761c79c6618f@redhat.com>

ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi