console_test: drop a redundant test
console_test: drop a redundant test

test_id:4636 connects to the console once, but test_id:1590 does the
same thing and more when it connects to the guest console 5 times.

With the removal of test_id:4636, deleteDataVolume() no longer needs to
check if dv is nil. We simplify it.

Signed-off-by: Dan Kenigsberg <184831158ae7531bcabc22617ed51e8717c81e93@redhat.com>

kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt