[libc++][NFC] Remove some unused code from <map>

[philnik777]

No description provided.

[llvmbot]

@llvm/pr-subscribers-libcxx

Author: Nikolas Klauser (philnik777)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/142408.diff

1 Files Affected:

• (modified) libcxx/include/map (-12)

diff --git a/libcxx/include/map b/libcxx/include/map
index 24eadbd154220..8c5799fbe6f10 100644
--- a/libcxx/include/map
+++ b/libcxx/include/map
@@ -750,21 +750,9 @@ public:
   }
 };
 
-template <class _TreeIterator>
-class __map_const_iterator;
-
 template <class _Key, class _Tp>
 struct __value_type;
 
-template <class _Tp>
-struct __extract_key_value_types;
-
-template <class _Key, class _Tp>
-struct __extract_key_value_types<__value_type<_Key, _Tp> > {
-  typedef _Key const __key_type;
-  typedef _Tp __mapped_type;
-};
-
 template <class _TreeIterator>
 class __map_iterator {
   typedef typename _TreeIterator::_NodeTypes _NodeTypes;