NetApp
Cluster : Configuration > Peers : Managing cluster peers : Deleting cluster peer relationships
Deleting cluster peer relationships
You can delete a cluster peer relationship from the Peer window.
Steps 
1.
From the Home tab, double-click the appropriate storage system.
2.
Ensure that the left navigation pane displays the cluster hierarchy.
3.
Click Configuration > Peers.
4.
Select the cluster peer that you want to delete, and then click Delete.
5.
Select the confirmation check box and click Delete.