Remove redundant form option

src/pretix/control/forms/event.py

@@ -397,11 +397,6 @@ class EventSettingsForm(SettingsForm):
         required=False,
         help_text=_("We'll show this publicly to allow attendees to contact you.")
     )
-    cancel_allow_user = forms.BooleanField(
-        label=_("Allow users to cancel unpaid orders"),
-        help_text=_("If checked, users can cancel orders by themselves as long as they are not yet paid."),
-        required=False
-    )
 
     def clean(self):
         data = super().clean()