Fix lint

aleksis/apps/lesrooster/models.py

@@ -375,9 +375,7 @@ class BreakSlot(Slot):
     """A break is a time period that can supervised and in which no lessons take place."""
 
     def __str__(self) -> str:
-        return (
-            f"{time_format(self.time_start)} - {time_format(self.time_end)}"
-        )
+        return f"{time_format(self.time_start)} - {time_format(self.time_end)}"
 
     class Meta:
         verbose_name = _("Break")

aleksis/apps/lesrooster/schema/slot.py

 from django.core.exceptions import PermissionDenied
-from django.db.models import Q
 
 import graphene
 from graphene_django.types import DjangoObjectType