OpenConceptLab/ocl_issues#927 Redis clustering, fixing formatting

core/settings.py

@@ -12,9 +12,7 @@
 
 import os
 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
-from datetime import timedelta
 
-from celery.schedules import crontab
 from corsheaders.defaults import default_headers
 from kombu import Queue, Exchange
 from redis.backoff import ExponentialBackoff