fix：报告pdf生成时，python版本兼容的问题

services/smart_report.go

@@ -141,7 +141,6 @@ func ReportToPdf(reportUrl, filePath string) (err error) {
 import asyncio
 from pyppeteer import launch
 
-@asyncio.coroutine
 async def main():
     # 异步代码
     browser = await launch({