code: public OperationFuture<AlertPolicy> delete(AlertPolicy policyRef) {
          client.deleteAlertPolicy(findByRef(policyRef).getId());
  
          return new OperationFuture<>(
              policyRef,
              new NoWaitingJobFuture()
          );
      }
docs: Remove Alert policy
  
  @param policyRef policy reference
  @return OperationFuture wrapper for AlertPolicy