How do I decommission a RHV environment?

I'm new to RH virtualization and, ironically, my first assignment for it is to decommission a 2-node dev cluster running RHEV 3.6.

The compute nodes are Cisco B200-M4 blades that connect via Cisco Fibre Channel switches to a Nimble SAN. The blades are configured to boot from the SAN. In RHEV manager, one node shows as "Normal" and the other as "SPM". There are VMs in the system but they're all powered off and can be deleted.

Is there anything special that I need to do to decom this, e.g. with the SPM? Or is it a simple case of just shutting down the two blades, trashing the boot and VM data volumes, removing the WWPNs from the FC switch, etc.?