rm redundant codes

msgvis/apps/dimensions/models.py

@@ -3,7 +3,7 @@
 from datetime import datetime, timedelta
 
 from django.db import models
-from django.db.models import Q, Count
+from django.db.models import Q
 from django.conf import settings
 from django.utils import dateformat, timezone
 
@@ -147,7 +147,7 @@ def get_domain(self, queryset, **kwargs):
         queryset = self.group_by(queryset, grouping_key='value')
 
         # Count the messages in each group
-        queryset = queryset.annotate(count=Count('id'))
+        queryset = queryset.annotate(count=models.Count('id'))
 
         queryset = queryset.order_by('-count')