To delete a node:
You are in the section Container Cluster > Cluster.
Please note: Each cluster must have at least one master and two workers. In addition, the initially created master cannot be deleted because it hosts the etcd database.
Select the desired cluster.
On the Nodes tab, click next to the node you want to delete.
The processes and containers running on the node to be deleted are distributed by Kubernetes to other nodes. The node is then deleted.