Move import to fix backwards-compat

- Legacy-Id: 3796

ietf/announcements/sitemaps.py

@@ -3,12 +3,12 @@
 from django.conf import settings
 from django.contrib.sitemaps import Sitemap
 from ietf.announcements.models import Announcement
-from ietf.announcements.models import Message
 
 class NOMCOMAnnouncementsMap(Sitemap):
     changefreq = "never"
     def items(self):
         if settings.USE_DB_REDESIGN_PROXY_CLASSES:
+            from ietf.announcements.models import Message
             return Message.objects.filter(related_groups__acronym__startswith="nomcom").exclude(related_groups__acronym="nomcom").order_by('-time')
         return Announcement.objects.all().filter(nomcom=True)
     def location(self, obj):