[gcc r13-5125] libstdc++: Remove _Alloc_node instance in _Rb_tree [PR107189]

[Francois Dumont]

https://gcc.gnu.org/g:b3c9148cad2f6f05ef9bc0be34b65a62a7e236dd

commit r13-5125-gb3c9148cad2f6f05ef9bc0be34b65a62a7e236dd
Author: François Dumont <fdumont@gcc.gnu.org>
Date:   Wed Oct 12 19:34:01 2022 +0200

    libstdc++: Remove _Alloc_node instance in _Rb_tree [PR107189]
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/107189
            * include/bits/stl_tree.h (_Rb_tree<>::_M_insert_range_equal): Remove
            unused _Alloc_node instance.

Diff:
---
 libstdc++-v3/include/bits/stl_tree.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/libstdc++-v3/include/bits/stl_tree.h b/libstdc++-v3/include/bits/stl_tree.h
index a4de6141765..33d25089a1d 100644
--- a/libstdc++-v3/include/bits/stl_tree.h
+++ b/libstdc++-v3/include/bits/stl_tree.h
@@ -1123,7 +1123,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	__enable_if_t<!__same_value_type<_InputIterator>::value>
 	_M_insert_range_equal(_InputIterator __first, _InputIterator __last)
 	{
-	  _Alloc_node __an(*this);
 	  for (; __first != __last; ++__first)
 	    _M_emplace_equal(*__first);
 	}