Remove unnecessary Celery options

I checked again, and Celery respects the scheduler and log levels configured in settings.

@hansegucker It turned out it was you who added the explicit log levels and scheduler classes to the docker entrypoint. Can you please check again why you deemed that necessary?

aleksis/core/settings.py

@@ -537,9 +537,7 @@ if _settings.get("dev.uwsgi.celery", True):
     concurrency = _settings.get("celery.uwsgi.concurrency", 2)
     UWSGI.setdefault("attach-daemon", [])
     UWSGI["attach-daemon"].append(f"celery -A aleksis.core worker --concurrency={concurrency}")
-    UWSGI["attach-daemon"].append(
-        "celery -A aleksis.core beat --scheduler django_celery_beat.schedulers:DatabaseScheduler"
-    )
+    UWSGI["attach-daemon"].append("celery -A aleksis.core beat")
 
 PWA_APP_NAME = lazy_preference("general", "title")
 PWA_APP_DESCRIPTION = lazy_preference("general", "description")