try to make pylint happy

dav_registration/models.py

@@ -182,7 +182,7 @@ Anmerkung:
             self.purge_at = self.__class__.calc_purge_at(self.event)
 
         self.full_clean()
-        super(Registration, self).save(**kwargs)
+        super().save(**kwargs)
 
         if creating:
             status = RegistrationStatus(registration=self)
@@ -238,7 +238,7 @@ class RegistrationStatus(models.Model):
 
     def save(self, **kwargs):
         self.full_clean()
-        super(RegistrationStatus, self).save(**kwargs)
+        super().save(**kwargs)
 
     def set_accepted(self):
         self.accepted = True