[committed] libstdc++: Revert making ref_view<R> statically sized.

[Hewill Kang]

This also allows:

std::array<int, 4> a;
std::simd::vec v{std::ranges::ref_view(a)};

But I don't think users will complain about this.
For library authors, is it unacceptable to have beneficial enhancements
that don't fully conform to the standards? hum.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://gcc.gnu.org/pipermail/libstdc++/attachments/20260527/04eb5f18/attachment-0001.htm>