code: func (util *DiskUtil) DeleteVolume(cd *cinderVolumeDeleter) error {
  	cloud, err := cd.plugin.getCloudProvider()
  	if err != nil {
  		return err
  	}
  
  	if err = cloud.DeleteVolume(cd.pdName); err != nil {
  		// OpenStack cloud provider returns volume.tryAgainError when necessary,
  		// no handling needed here.
  		klog.V(2).Infof("Error deleting cinder volume %s: %v", cd.pdName, err)
  		return err
  	}
  	klog.V(2).Infof("Successfully deleted cinder volume %s", cd.pdName)
  	return nil
  }
docs: // DeleteVolume uses the cloud entrypoint to delete specified volume