Do not require --cluster in image-load
`image-load` script still correctly defaults to `k3s-default` or `kind` based on
the k8s distro being used.
Found when trying to use the `install-pr` script and `--cluster` was being
required.
@@ -44,11 +44,6 @@ do
;;
--cluster)
cluster=$2
- if [ -z "$cluster" ]; then
- echo 'Error: the argument for --cluster was not specified' >&2
- usage
- exit 1
- fi
shift
;;
--kind)
