node-handle doc

Author: vinay-deshmukh

libcxx/include/__node_handle

@@ -180,16 +180,7 @@ struct __map_node_handle_specifics {
   using key_type    = __remove_const_t<typename _NodeType::__node_value_type::first_type>;
   using mapped_type = typename _NodeType::__node_value_type::second_type;
 
-  /*
-  As this method this->key() returns a non-const reference
-  to the `key_type` which is const inside `node_type`.
-  This means that we can't make this member method constexpr until CWG2514 is resolved.
-  This disallows making the member function constexpr.
-
-  More here:
-  * https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2025/p3372r3.html#node-handle-key
-  * https://cplusplus.github.io/CWG/issues/2514.html
-  */
+  // This method is not constexpr as per the standard.
   _LIBCPP_HIDE_FROM_ABI key_type& key() const {
     return const_cast<key_type&>(static_cast<_Derived const*>(this)->__ptr_->__get_value().first);
   }