Remove c++11 flag, the failure is not related to the c++ standard

Author: iMichka

unittests/test_non_copyable_recursive.py

@@ -15,7 +15,6 @@ class Test(parser_test_case.parser_test_case_t):
     def __init__(self, *args):
         parser_test_case.parser_test_case_t.__init__(self, *args)
         self.header = "test_non_copyable_recursive.hpp"
-        self.config.cflags = "-std=c++11"
 
     def test_infinite_recursion_base_classes(self):
         """