Revert of [telemetry] Script for finding all Telemetry dependencies.

tools/telemetry_tools/path_set_unittest.py

-#!/usr/bin/env python
-# Copyright (c) 2014 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 os
-import unittest
-
-import path_set
-
-
-class PathSetTest(unittest.TestCase):
-  def testCreate(self):
-    ps = path_set.PathSet()
-    self.assertEqual(len(ps), 0)
-    self.assertFalse(__file__ in ps)
-    for path in ps:
-      self.fail('New set is not empty.')
-
-    ps = path_set.PathSet([__file__])
-    self.assertEqual(len(ps), 1)
-    self.assertTrue(__file__ in ps)
-    self.assertEqual(ps.pop(), os.path.realpath(__file__))
-
-  def testAdd(self):
-    ps = path_set.PathSet()
-    ps.add(__file__)
-    self.assertEqual(len(ps), 1)
-    self.assertTrue(__file__ in ps)
-    self.assertEqual(ps.pop(), os.path.realpath(__file__))
-
-  def testDiscard(self):
-    ps = path_set.PathSet([__file__])
-    ps.discard(__file__)
-    self.assertEqual(len(ps), 0)
-    self.assertFalse(__file__ in ps)
-
-
-if __name__ == '__main__':
-  unittest.main()