fix documentation of low level transaction (#390)

André Felipe Dias · web-flow · commit 612857d0224a · 2021-09-13T15:53:39.000+04:30
diff --git a/docs/connections_and_transactions.md b/docs/connections_and_transactions.md
@@ -80,7 +80,6 @@ For a lower-level transaction API:
 ```python
 transaction = await database.transaction()
 try:
-    await transaction.start()
     ...
 except:
     await transaction.rollback()
