Remove python 2.6 specific code

Author: iMichka

unittests/parser_test_case.py

@@ -4,7 +4,6 @@
 # See http://www.boost.org/LICENSE_1_0.txt
 
 import pprint
-import sys
 import time
 import unittest
 
@@ -101,20 +100,4 @@ def _test_calldef_exceptions(self, calldef, exceptions):
                 "reality it is different('%s')") %
             (calldef.name,
              pprint.pformat([delc.name for delc in exception_decls]),
-             pprint.pformat([delc.name for delc in exceptions_indeed])))
-
-
-if sys.version_info[:3] < (2, 7, 0):
-    # Python2.6 does not have the following methods in the unittest module
-    parser_test_case_t.assertIn = \
-        lambda parser, a1, a2, *args: parser.assertTrue(a1 in a2, args)
-    parser_test_case_t.assertNotIn = \
-        lambda parser, a1, a2, *args: parser.assertFalse(a1 in a2, args)
-    parser_test_case_t.assertIs = \
-        lambda parser, a1, a2, *args: parser.assertTrue(a1 is a2, args)
-    parser_test_case_t.assertIsNot = \
-        lambda parser, a1, a2, *args: parser.assertFalse(a1 is a2, args)
-    parser_test_case_t.assertIsNone = \
-        lambda parser, a1, *args: parser.assertTrue(a1 is None, args)
-    parser_test_case_t.assertIsNotNone = \
-        lambda parser, a1, *args: parser.assertFalse(a1 is None, args)
+             pprint.pformat([delc.name for delc in exceptions_indeed])))