Using the Cmdlets : Deleting VPGs
  
Deleting VPGs
You can delete VPGs from a site via the following cmdlets:
Unprotect-Vpg: Deletes the VPG, leaving the virtual machines that comprised the VPG unprotected. This cmdlet is described in Deleting a VPG.
ForceRemove-ProtectionGroup: Deletes the VPG regardless of its state, for example when the Unprotect-Vpg cmdlet failed. This cmdlet is described in Forcibly Deleting a VPG.
Deleting VPGs protecting virtual machines that are also protected in other VPGs, will not affect the virtual machines in the other VPGs.