code: func (h *Handle) XfrmPolicyDel(policy *XfrmPolicy) error {
  	_, err := h.xfrmPolicyGetOrDelete(policy, nl.XFRM_MSG_DELPOLICY)
  	return err
  }
docs: // XfrmPolicyDel will delete an xfrm policy from the system. Note that
  // the Tmpls are ignored when matching the policy to delete.
  // Equivalent to: `ip xfrm policy del $policy`