Remove leftovers from deleted cluster on Rancher 2.6.x

gistfile1.txt

Sometimes when you delete a cluster from Rancher, it still appears in the Home dashboard and also on the left menu. 
This is not only cosmetic, but if you try to import a new cluster under the same name, it does not work.
To definitely remove it, login to Rancher cluster and type the following:

kubectl get clusters.management.cattle.io  # find the cluster you want to delete 
kubectl describe clusters.management.cattle.io <cluster-id from previous command> # Find the Display name for the cluster and confirm it is the one you want
export CLUSTERID="c-xxxxxxxxx"
kubectl patch clusters.management.cattle.io $CLUSTERID -p '{"metadata":{"finalizers":[]}}' --type=merge
kubectl delete clusters.management.cattle.io $CLUSTERID