Revert "change avatars every 30 minutes"

This reverts commit ee9f8a0af9.
Yeah actually nevermind.

bot.py

@@ -1,15 +1,10 @@
 #!/usr/bin/env python3
 # encoding: utf-8
 
-import random
-import asyncio
 import logging
-import os.path
 import traceback
-from glob import glob
 
 import discord
-import aiofiles
 from discord.ext import commands
 
 logging.basicConfig(level=logging.WARNING)
@@ -31,14 +26,6 @@ class Bot(commands.AutoShardedBot):
 
 	async def on_ready(self):
 		logger.info('Logged on as {0} (ID: {0.id})'.format(self.user))
-		bot.loop.create_task(self.change_avatar_loop())
-
-	async def change_avatar_loop(self):
-		while await asyncio.sleep(30*60, True):
-			glob_pattern = os.path.join('avatars', '*')
-
-			async with aiofiles.open(random.choice(glob(glob_pattern)), 'rb') as f:
-				await self.user.edit(avatar=await f.read())
 
 	# https://github.com/Rapptz/RoboDanny/blob/ca75fae7de132e55270e53d89bc19dd2958c2ae0/bot.py#L77-L85
 	async def on_command_error(self, context, error):