[libc++][NFC] Remove __all_default_constructible

[philnik777]

__all_default_constructible is never used, so we can remove it.

[llvmbot]

@llvm/pr-subscribers-libcxx

Author: Nikolas Klauser (philnik777)

Changes

__all_default_constructible is never used, so we can remove it.

---

Full diff: https://github.com/llvm/llvm-project/pull/150406.diff

1 Files Affected:

• (modified) libcxx/include/tuple (-6)

diff --git a/libcxx/include/tuple b/libcxx/include/tuple
index 662d926ed35a2..1623702f7ebf6 100644
--- a/libcxx/include/tuple
+++ b/libcxx/include/tuple
@@ -443,12 +443,6 @@ public:
 template <class... _Tp>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 void __swallow(_Tp&&...) _NOEXCEPT {}
 
-template <class _Tp>
-struct __all_default_constructible;
-
-template <class... _Tp>
-struct __all_default_constructible<__tuple_types<_Tp...>> : __all<is_default_constructible<_Tp>::value...> {};
-
 // __tuple_impl
 
 template <class _Indx, class... _Tp>