Revert accidental check-in.  These changes are probably good, but premature at this point.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@174625 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__split_buffer b/include/__split_buffer
index d498b21..e0aa13b 100644
--- a/include/__split_buffer
+++ b/include/__split_buffer
@@ -290,7 +290,7 @@
 __split_buffer<_Tp, _Allocator>::__destruct_at_begin(pointer __new_begin, false_type)
 {
     while (__begin_ != __new_begin)
-        __alloc_traits::destroy(__alloc(), _VSTD::__to_raw_pointer(__begin_++));
+        __alloc_traits::destroy(__alloc(), __begin_++);
 }
 
 template <class _Tp, class _Allocator>
@@ -307,7 +307,7 @@
 __split_buffer<_Tp, _Allocator>::__destruct_at_end(pointer __new_last, false_type) _NOEXCEPT
 {
     while (__new_last != __end_)
-        __alloc_traits::destroy(__alloc(), _VSTD::__to_raw_pointer(--__end_));
+        __alloc_traits::destroy(__alloc(), --__end_);
 }
 
 template <class _Tp, class _Allocator>