Refs #27795 -- Removed unneeded force_text calls

Thanks Tim Graham for the review.

tests/string_lookup/tests.py

@@ -51,9 +51,6 @@ class StringLookupTests(TestCase):
         fx.save()
         self.assertEqual(Foo.objects.get(friend__contains='\xe7'), fx)
 
-        # We can also do the above query using UTF-8 strings.
-        self.assertEqual(Foo.objects.get(friend__contains=b'\xc3\xa7'), fx)
-
     def test_queries_on_textfields(self):
         """
         Regression tests for #5087