diff --git a/aleksis/apps/ticdesk/model_extensions.py b/aleksis/apps/ticdesk/model_extensions.py
index 863b95ef6ae25a9ec35e884fbb059d5733a0926c..7009b57a315692f0c4bb7e075ac686bf0d06cf4c 100644
--- a/aleksis/apps/ticdesk/model_extensions.py
+++ b/aleksis/apps/ticdesk/model_extensions.py
@@ -4,21 +4,6 @@ from jsonstore import CharField
 
 from aleksis.core.models import Person
 
-from .models import TeckidsMember
-
-
-@Person.property_
-def is_member_of(self, group):
-    """ Check if person is member of a given group """
-
-    return group in self.member_of.all()
-
-
-@Person.property_
-def is_member(self) -> bool:
-    """Check if person is still a member."""
-    return TeckidsMember.objects.filter(person=self).exists()
-
 
 # Additional fields for persons
 Person.field(school=CharField(verbose_name=_("Name of school")))