Removed flake8, black and isort; moving towards ruff default settings instead.

tests/performance/kyoukai/simple_server.py

@@ -4,10 +4,8 @@ import logging
 
 import ujson
 import uvloop
-
 from kyoukai import HTTPRequestContext, Kyoukai
 
-
 loop = uvloop.new_event_loop()
 asyncio.set_event_loop(loop)