fuel, armband: Remove/disable artifact download

fuel, armband: Remove/disable artifact download

Armband no longer requires any artifact before starting a deployment.
Fuel (master and stable/E) no longer requires the artifact either,
but since there are some stable/danube deploy jobs on ZTE PODs, we
will hold off removing <fuel-download-artifact.sh> for a while.

Deprecation warning: fuel-download-artifact.sh will be removed later.

JIRA: ARMBAND-295

Change-Id: I3b26733a1120306879eff83b9fac3390b3f5c7b8
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>