Remove loop parameter

Seems that newer versions of aiohttp do not use `loop` anymore, similar to new Python versions.

Author: tt2468

main.py

@@ -133,4 +133,4 @@ async def shutdown(app):
     app.add_routes([web.post('/call/{requestType}', call_request_callback), web.post('/emit/{requestType}', emit_request_callback)])
     app.on_cleanup.append(shutdown)
 
-    web.run_app(app, host=httpAddress, port=httpPort, loop=loop)
+    web.run_app(app, host=httpAddress, port=httpPort)