Remove organizer property from ICalendar files as we used it not as it is intended to be used.

src/pretix/presale/ical.py

@@ -31,7 +31,6 @@ def get_ical(events):
         vevent.add('dtstamp').value = creation_time
         if ev.location:
             vevent.add('location').value = str(ev.location)
-        vevent.add('organizer').value = event.organizer.name
         vevent.add('uid').value = 'pretix-{}-{}-{}@{}'.format(
             event.organizer.slug, event.slug,
             ev.pk if not isinstance(ev, Event) else '0',
@@ -57,5 +56,7 @@ def get_ical(events):
                 datetime=date_format(ev.date_admission.astimezone(tz), 'SHORT_DATETIME_FORMAT')
             ))
 
+        descr.append(_('Organizer: {organizer}').format(organizer=event.organizer.name))
+
         vevent.add('description').value = '\n'.join(descr)
     return cal

src/tests/presale/test_event.py

@@ -884,7 +884,6 @@ class EventIcalDownloadTest(EventTestMixin, SoupTest):
         ical = self.client.get('/%s/%s/ical/' % (self.orga.slug, self.event.slug)).content.decode()
         self.assertIn('SUMMARY:%s' % self.event.name, ical, 'incorrect correct summary')
         self.assertIn('LOCATION:DUMMY ARENA', ical, 'incorrect location')
-        self.assertIn('ORGANIZER:%s' % self.event.organizer.name, ical, 'incorrect organizer')
         self.assertTrue(re.search(r'DTSTAMP:\d{8}T\d{6}Z', ical), 'incorrect timestamp')
         self.assertTrue(re.search(r'UID:pretix-\w*-\w*-0@', ical), 'missing UID key')