[gcc r15-3051] libstdc++: Remove redundant reclaration of std::optional

[Jonathan Wakely via Libstdc++-cvs]

https://gcc.gnu.org/g:5d5193f0734fb4706940f7ac79899da25250be9d

commit r15-3051-g5d5193f0734fb4706940f7ac79899da25250be9d
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Tue Aug 20 11:54:25 2024 +0100

    libstdc++: Remove redundant reclaration of std::optional
    
    We've already declared optional at the top of the header, so don't need
    to do it again.
    
    libstdc++-v3/ChangeLog:
    
            * include/std/optional: Remove redundant redeclaration.

Diff:
---
 libstdc++-v3/include/std/optional | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/libstdc++-v3/include/std/optional 
b/libstdc++-v3/include/std/optional
index 2c4cc260f90e..6651686cd1d0 100644
--- a/libstdc++-v3/include/std/optional
+++ b/libstdc++-v3/include/std/optional
@@ -741,9 +741,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     };
 #endif // __cpp_concepts
 
-  template<typename _Tp>
-  class optional;
-
   template<typename _Tp>
     inline constexpr bool __is_optional_v = false;
   template<typename _Tp>