taobao.item.sku.delete 删除SKU
        
        删除一个sku的数据 需要删除的sku通过属性properties进行匹配查找

def delete(self, num_iid, properties, session, item_price=None, item_num=None, lang=None):
        '''taobao.item.sku.delete 删除SKU
        
        删除一个sku的数据 需要删除的sku通过属性properties进行匹配查找'''
        request = TOPRequest('taobao.item.sku.delete')
        request['num_iid'] = num_iid
        request['properties'] = properties
        if item_num!=None:
            request['item_num'] = item_num
        if item_price!=None:
            request['item_price'] = item_price
        if lang!=None:
            request['lang'] = lang
        self.create(self.execute(request, session)['sku'])
        return self