code: func (util *portworxVolumeUtil) DeleteVolume(d *portworxVolumeDeleter) error {
  	driver, err := util.getPortworxDriver(d.plugin.host)
  	if err != nil || driver == nil {
  		klog.Errorf("Failed to get portworx driver. Err: %v", err)
  		return err
  	}
  
  	err = driver.Delete(d.volumeID)
  	if err != nil {
  		klog.Errorf("Error deleting Portworx Volume (%v): %v", d.volName, err)
  		return err
  	}
  	return nil
  }
docs: // DeleteVolume deletes a Portworx volume