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()

src/pretix/control/templates/pretixcontrol/event/settings.html

@@ -68,7 +68,6 @@
             {% bootstrap_field sform.order_email_asked_twice layout="control" %}
             {% bootstrap_field sform.attendee_emails_asked layout="control" %}
             {% bootstrap_field sform.attendee_emails_required layout="control" %}
-            {% bootstrap_field sform.cancel_allow_user layout="control" %}
         </fieldset>
         <fieldset>
             <legend>{% trans "Waiting list" %}</legend>