Mark test_div() in past.tests.test_translation as now working on Py3

- past.translation feature now understands "3 / 2" in Py2 code as integer
  division.

Author: edschofield

past/tests/test_translation.py

@@ -83,7 +83,6 @@ def test_exec_statement(self):
         module = self.write_and_import(code, 'execer')
         self.assertEqual(module.x, 7)
 
-    @expectedFailurePY3
     def test_div(self):
         code = """
         x = 3 / 2