You can delete clusters from Container Service.
Note: Deleting the cluster also deletes its associated Elastic Compute Service (ECS) instances, Server Load Balancer instance, and other cloud resources, so proceed with caution.
Log on to the Container Service console.
Click Clusters in the left-side navigation pane.
On the Cluster List page, click Delete at the right of the cluster you are about to delete.
The Delete Cluster dialog box appears. Select whether or not to keep the Server Load Balancer instance and click OK.