REmoved some unused imports

django/db/migrations/operations/special.py

@@ -1,7 +1,6 @@
 import re
+
 from .base import Operation
-from django.db import models, router
-from django.db.migrations.state import ModelState
 
 
 class SeparateDatabaseAndState(Operation):

django/test/_doctest.py

@@ -112,7 +112,7 @@ import unittest, difflib, pdb, tempfile
 import warnings
 
 from django.utils import six
-from django.utils.six.moves import StringIO, xrange
+from django.utils.six.moves import StringIO
 
 if sys.platform.startswith('java'):
     # On Jython, isclass() reports some modules as classes. Patch it.