fix(api): changed rate limit library, now play well with testing

backend/tests/test_control.py

@@ -1,11 +1,8 @@
 import pytest
 from httpx import AsyncClient
-from starlette.testclient import TestClient
 
 from src.neo_neo_todo.main import app
 
-client = TestClient(app)
-
 
 @pytest.mark.anyio
 async def test_ping():