Deleting System Clusters 
After you performed an initial configuration of central CTS, your systems are ready for work with central CTS. After some time, you may want to make changes to this initial configuration. For example, you may want to delete a system cluster because development of a project has ended.
Caution
Delete system clusters only in the Central CTS Configuration Web UI. Do not delete any system clusters in Transport Management System. Otherwise, you will get an inconsistent system state.
Prerequisites
You are in the Central CTS Configuration Web UI.
The cluster that you want to delete does not contain any open transport collections that must still be transported through the system landscape. Otherwise, you will get an inconsistent system state.
Procedure
To delete an existing cluster, select the cluster and choose
Cluster 
Delete Cluster 
.To confirm the deletion, choose Delete.
Result
You have deleted a system cluster.
If the system cluster was connected to other system clusters using transport routes, you must delete the transport routes.