Remove RQ dependency

Author: cunla

.github/workflows/test.yml

@@ -110,7 +110,7 @@ jobs:
           else
             export BROKER_PORT=6379
           fi
-          poetry run python manage.py test scheduler --exclude-tag multiprocess
+          poetry run python manage.py test --exclude-tag multiprocess scheduler
 
       # Steps for coverage check
       - name: Run tests with coverage