drop shebang and “if __name__ == "__main__":” off individual tests

• doesn’t work right anyway, ever since test/util.py was imported
  relatively
• we have top-level ./test.py now, which works on 2.5+ and 3.x

test/test_musicxml.py

-#!/usr/bin/env python
 # ~*~ coding: utf-8 ~*~
 
 # Copyright © 2017
@@ -37,6 +36,3 @@ class MusicXMLTests(unittest.TestCase):
         with open(xmlfile, "rb") as f:
             expected = f.read()
         self.assertEqual(xml, expected[:-1])
-
-if __name__ == "__main__":
-    unittest.main()

test/test_parser.py

-#!/usr/bin/env python
 # ~*~ coding: utf-8 ~*~
 
 # Copyright © 2017
@@ -593,6 +592,3 @@ class ParserTests(TestCase):
         res[1] = mml(input, _mmltrk=_getres)
         self.assertEqual(res[0], expected_mml)
         self.assertListEqual(round_sequence_r(res[1]), round_sequence_r(expected_lst))
-
-if __name__ == "__main__":
-    unittest.main()

test/test_playlist.py

-#!/usr/bin/env python
 # ~*~ coding: utf-8 ~*~
 
 # Copyright © 2017
@@ -392,6 +391,3 @@ class PlaylistTests(TestCase):
                       (1.5296000000000001, [(1, 0), (2, 0), (4, 0)])])]
         self.assertListEqual(round_sequence_r(res), round_sequence_r(expected))
         self.assertEqual(errors, [])
-
-if __name__ == "__main__":
-    unittest.main()