Fix more deprecation warnings for 3.8

discord/client.py

@@ -74,7 +74,7 @@ def _cancel_tasks(loop):
     for task in tasks:
         task.cancel()
 
-    loop.run_until_complete(asyncio.gather(*tasks, loop=loop, return_exceptions=True))
+    loop.run_until_complete(asyncio.gather(*tasks, return_exceptions=True))
     log.info('All tasks finished cancelling.')
 
     for task in tasks:

discord/gateway.py

@@ -744,7 +744,7 @@ class DiscordVoiceWebSocket(websockets.client.WebSocketClientProtocol):
 
     async def poll_event(self):
         try:
-            msg = await asyncio.wait_for(self.recv(), timeout=30.0, loop=self.loop)
+            msg = await asyncio.wait_for(self.recv(), timeout=30.0)
             await self.received_message(json.loads(msg))
         except websockets.exceptions.ConnectionClosed as exc:
             raise ConnectionClosed(exc, shard_id=None) from exc

docs/ext/tasks/index.rst

@@ -110,7 +110,7 @@ Doing something during cancellation:
         def __init__(self, bot):
             self.bot= bot
             self._batch = []
-            self.lock = asyncio.Lock(loop=bot.loop)
+            self.lock = asyncio.Lock()
             self.bulker.start()
 
         async def do_bulk(self):