Remove left-over ready() method

aleksis/core/apps.py

+from typing import Any, List, Optional, Tuple
+
 from .signals import clean_scss
 from .util.apps import AppConfig
 
@@ -6,9 +8,6 @@ class CoreConfig(AppConfig):
     name = "aleksis.core"
     verbose_name = "AlekSIS — The Free School Information System"
 
-    def ready(self) -> None:
-        super().ready()
-
     def config_updated(self, *args, **kwargs) -> None:
         clean_scss()