Remove undef macros

Author: c8ef

libcxx/include/__algorithm/for_each.h

@@ -21,9 +21,6 @@
 #  pragma GCC system_header
 #endif
 
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
-
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _InputIterator, class _Sent, class _Func, class _Proj>
@@ -59,6 +56,4 @@ for_each(_InputIterator __first, _InputIterator __last, _Func __f) {
 
 _LIBCPP_END_NAMESPACE_STD
 
-_LIBCPP_POP_MACROS
-
 #endif // _LIBCPP___ALGORITHM_FOR_EACH_H