Remove unused import

supervisor/tests/test_http.py

@@ -140,7 +140,6 @@ class TailFProducerTests(unittest.TestCase):
 
     def test_handle_more_follow(self):
         request = DummyRequest('/logtail/foo', None, None, None)
-        from supervisor import http
         f = tempfile.NamedTemporaryFile()
         f.write('a' * 80)
         f.flush()