def image_delete(self, product_id, position, session):
        '''taobao.fenxiao.product.image.delete 产品图片删除
        
        产品图片删除，只删除图片信息，不真正删除图片'''
        request = TOPRequest('taobao.fenxiao.product.image.delete')
        request['product_id'] = product_id
        request['position'] = position
        self.create(self.execute(request, session), fields=['result','created'], models={'created':TOPDate})
        return self