Upd libc++ to 18 Jun 2022 ff3989e6ae740a9b3adaad0e2bf7691ffd6dad12

```
[libc++] Add Implemented Papers section
[libc++] Enable -Wweak-vtables
[libc++] Make sure we install libc++abi headers on Apple
[libc++] Don't force -O2 when building the benchmarks
[libc++] Mark standard-mandated includes as such
[libc++] Implement std::boyer_moore{, _horspool}_searcher
[libc++] Unwrap reverse_iterator<reverse_iterator<Iter>> in __unwrap_iter
[libc++] Simplify __config a bit
[libc++][ranges] Implement `ranges::sort`.
[libc++] Remove now-unused experimental/filesystem config file
[libc++] Robust against C++20-hostile iterators
[libc++] Implement ranges::lexicographical_compare
[libc++] Removes unneeded <iterator> includes.
[libcxx] Fix allocator<void>::pointer in C++20 with removed members
[libcxx] Remove extraneous '---' lines in .clang-format files
[libc++][NFCI] span: replace enable_if with concepts
[libc++] Find a clang-format everybody is happy with
[libc++] Use explicit module cache path in tests
[libc++] Remove macros for IBM compiler
```

1 files changed, 0 insertions, 19 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/copy.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/copy.h
index 2a4e535c6f..886a1ac6ce 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/copy.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/copy.h
@@ -74,13 +74,6 @@ __copy_impl(reverse_iterator<_InIter> __first,
   return std::make_pair(__last, reverse_iterator<_OutIter>(std::__rewrap_iter(__result.base(), __result_first)));
 }
 
-template <class _InIter, class _Sent, class _OutIter>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11
-pair<reverse_iterator<reverse_iterator<_InIter> >, reverse_iterator<reverse_iterator<_OutIter> > >
-__copy_impl(reverse_iterator<reverse_iterator<_InIter> > __first,
-            reverse_iterator<reverse_iterator<_Sent> > __last,
-            reverse_iterator<reverse_iterator<_OutIter> > __result);
-
 template <class _InIter, class _Sent, class _OutIter,
           __enable_if_t<!(is_copy_constructible<_InIter>::value
                        && is_copy_constructible<_Sent>::value
@@ -101,18 +94,6 @@ __copy(_InIter __first, _Sent __last, _OutIter __result) {
   return std::make_pair(std::__rewrap_iter(__first, __ret.first), std::__rewrap_iter(__result, __ret.second));
 }
 
-// __unwrap_iter can't unwrap random_access_iterators, so we need to unwrap two reverse_iterators manually
-template <class _InIter, class _Sent, class _OutIter>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11
-pair<reverse_iterator<reverse_iterator<_InIter> >, reverse_iterator<reverse_iterator<_OutIter> > >
-__copy_impl(reverse_iterator<reverse_iterator<_InIter> > __first,
-            reverse_iterator<reverse_iterator<_Sent> > __last,
-            reverse_iterator<reverse_iterator<_OutIter> > __result) {
-  auto __ret = std::__copy(__first.base().base(), __last.base().base(), __result.base().base());
-  return std::make_pair(reverse_iterator<reverse_iterator<_InIter> >(reverse_iterator<_InIter>(__ret.first)),
-                        reverse_iterator<reverse_iterator<_OutIter> >(reverse_iterator<_OutIter>(__ret.second)));
-}
-
 template <class _InputIterator, class _OutputIterator>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
 _OutputIterator