[pinpoint] Move mann_whitney_u.py to models/

dashboard/dashboard/pinpoint/mann_whitney_u_test.py

Index: dashboard/dashboard/pinpoint/mann_whitney_u_test.py
diff --git a/dashboard/dashboard/pinpoint/mann_whitney_u_test.py b/dashboard/dashboard/pinpoint/mann_whitney_u_test.py
deleted file mode 100644
index c997b7144883e6f73f8f16669f3e2ed5d5766c21..0000000000000000000000000000000000000000
--- a/dashboard/dashboard/pinpoint/mann_whitney_u_test.py
+++ /dev/null
@@ -1,32 +0,0 @@
-# Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import unittest
-
-from dashboard.pinpoint import mann_whitney_u
-
-
-class MannWhitneyUTest(unittest.TestCase):
-  def testBasic(self):
-    self.assertAlmostEqual(
-        mann_whitney_u.MannWhitneyU(range(10), range(20, 30)),
-        0.00018267179110955002)
-    self.assertAlmostEqual(
-        mann_whitney_u.MannWhitneyU(range(5), range(10)),
-        0.13986357686781267)
-
-  def testDuplicateValues(self):
-    self.assertAlmostEqual(mann_whitney_u.MannWhitneyU([0] * 5, [1] * 5),
-                           0.0039767517097886512)
-
-  def testSmallSamples(self):
-    self.assertEqual(mann_whitney_u.MannWhitneyU([0], [1]), 1.0)
-
-  def testAllValuesIdentical(self):
-    with self.assertRaises(ValueError):
-      mann_whitney_u.MannWhitneyU([0] * 5, [0] * 5)
-
-
-if __name__ == '__main__':
-  unittest.main()