diff --git a/bin/gen_release_notes.py b/bin/gen_release_notes.py
index 222ff653dc8..dbbe4ec5ccd 100755
--- a/bin/gen_release_notes.py
+++ b/bin/gen_release_notes.py
@@ -226,7 +226,6 @@ async def gather_bugs(version: str) -> typing.List[str]:
     loop = asyncio.get_event_loop()
     async with aiohttp.ClientSession(loop=loop) as session:
         results = await asyncio.gather(*[get_bug(session, i) for i in issues])
-    typing.cast(typing.Tuple[str, ...], results)
     bugs = list(results)
     if not bugs:
         bugs = ['None']