🔥 Remove Celery and Flower, they are currently not used nor recommended (#694)

backend/app/tests/api/routes/test_celery.py

@@ -1,16 +0,0 @@
-from fastapi.testclient import TestClient
-
-from app.core.config import settings
-
-
-def test_celery_worker_test(
-    client: TestClient, superuser_token_headers: dict[str, str]
-) -> None:
-    data = {"message": "test"}
-    r = client.post(
-        f"{settings.API_V1_STR}/utils/test-celery/",
-        json=data,
-        headers=superuser_token_headers,
-    )
-    response = r.json()
-    assert response["message"] == "Word received"