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 --git a/libstdc++-v3/include/std/optional b/libstdc++-v3/include/std/optional
index 2c4cc260f90ebdff74288a2c91db65b1b92c8466..6651686cd1d0e6f8cf8ec3f1b4db3bb85673df96 100644 (file)
--- 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>