PlateSpin Transformation Manager discovers VMware Clusters and their member hosts as associated resources of a VMware vCenter Server Platform. You cannot delete them from within PTM. However, you can use the Exclude action to make the resources unavailable for migration or enhanced tracking. Excluded resources do not appear in other dialogs for planning.
If you modify clusters or hosts for vCenter platforms in your production environment, you can rediscover the platform to update its associated resources.