Hi,
If it's a physical disk, the Set-Disk cmdlet can take disks offline for you.
Set-Disk -Number <Disk Number> -IsOffline $True
If it's a CSV, you can use Remove-ClusterSharedVolume to remove the volume.
Remove-ClusterSharedVolume -Name <Cluster Disk Name>
Please refer to the links below for more details
Set-Disk (Storage) | Microsoft Learn
Remove-ClusterSharedVolume (FailoverClusters) | Microsoft Learn