Rewrite gateway to use aiohttp instead of websockets

discord/ext/tasks/__init__.py

@@ -27,7 +27,6 @@ DEALINGS IN THE SOFTWARE.
 import asyncio
 import datetime
 import aiohttp
-import websockets
 import discord
 import inspect
 import logging
@@ -58,8 +57,6 @@ class Loop:
             discord.ConnectionClosed,
             aiohttp.ClientError,
             asyncio.TimeoutError,
-            websockets.InvalidHandshake,
-            websockets.WebSocketProtocolError,
         )
 
         self._before_loop = None