fix double imports again

Author: Johnetordoff

website/settings/defaults.py

@@ -553,8 +553,6 @@ class CeleryConfig:
         'osf.management.commands.registration_schema_metrics',
         'website.mailchimp_utils',
         'website.notifications.tasks',
-        'website.notifications.tasks.send_users_digest_email',
-        'website.notifications.tasks.send_moderators_digest_email',
         'website.archiver.tasks',
         'website.identifiers.tasks',
         'website.search.search',