delete WSFC 2012 cluster role/group fails
As a quick workaround ended up deleting whole cluster:

PS C:\Windows\system32&gt; Import-Module FailoverClusters
PS C:\Windows\system32&gt; clear-clusternode
Clear-ClusterNode
Are you sure you want to forcefully clean up cluster node SRVGNPW049?
[Y] Yes  [N] No  [S] Suspend  [?] Help (default is "Y"): Y
PS C:\Windows\system32&gt;


And then recreating a new one.