[gcc r15-3268] libstdc++: Remove unused typedef in <ranges>

[Jonathan Wakely]

https://gcc.gnu.org/g:a59f1cc31cf6c7ed30a78cef134ea3ed5e139414

commit r15-3268-ga59f1cc31cf6c7ed30a78cef134ea3ed5e139414
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Wed Aug 28 11:49:08 2024 +0100

    libstdc++: Remove unused typedef in <ranges>
    
    This local typedef should have been removed in r14-6199-g45630fbcf7875b.
    
    libstdc++-v3/ChangeLog:
    
            * include/std/ranges (to): Remove unused typedef.

Diff:
---
 libstdc++-v3/include/std/ranges | 1 -
 1 file changed, 1 deletion(-)

diff --git a/libstdc++-v3/include/std/ranges b/libstdc++-v3/include/std/ranges
index b7c7aa36ddc4..aa08a48440cf 100644
--- a/libstdc++-v3/include/std/ranges
+++ b/libstdc++-v3/include/std/ranges
@@ -9327,7 +9327,6 @@ namespace __detail
 			 std::forward<_Args>(__args)...);
 	  else
 	    {
-	      using _RefT = range_reference_t<_Rg>;
 	      static_assert(constructible_from<_Cont, _Args...>);
 	      _Cont __c(std::forward<_Args>(__args)...);
 	      if constexpr (sized_range<_Rg>