Tests: Fix improper cleanup of SITE_URL

src/tests/multidomain/test_plugin_handler.py

@@ -20,7 +20,6 @@
 # <https://www.gnu.org/licenses/>.
 #
 import pytest
-from django.conf import settings
 from django.utils.timezone import now
 
 from pretix.base.models import Event, Organizer
@@ -33,7 +32,6 @@ def event():
         organizer=o, name='MRMCD2015', slug='2015',
         date_from=now(),
     )
-    settings.SITE_URL = 'http://example.com'
     return event