Fixed #16225 -- Removed unused imports. Many thanks to Aymeric Augustin for the work on the patch and Alex for reviewing.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16539 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/basic/models.py

@@ -4,7 +4,7 @@
 
 This is a basic model with only two non-primary-key fields.
 """
-from django.db import models, DEFAULT_DB_ALIAS, connection
+from django.db import models
 
 class Article(models.Model):
     headline = models.CharField(max_length=100, default='Default headline')