Removed unused import, unused setting

app/scheduler.py

@@ -1,4 +1,4 @@
-import logging, traceback
+import logging
 from apscheduler.schedulers.background import BackgroundScheduler
 from apscheduler.schedulers import SchedulerAlreadyRunningError, SchedulerNotRunningError
 from threading import Thread, Lock

webodm/settings.py

@@ -218,10 +218,6 @@ REST_FRAMEWORK = {
   'PAGE_SIZE': 10,
 }
 
-# Raster
-RASTER_USE_CELERY = False
-
-
 TESTING = sys.argv[1:2] == ['test']
 
 try: