[func.wrap.ref.class] Remove redundant declaration for function_ref as per #6273.

burblebee · tkoeppe · commit f01d7ea32dfe · 2023-07-21T16:49:23.000+01:00
diff --git a/source/utilities.tex b/source/utilities.tex
@@ -13472,8 +13472,6 @@
 \indexlibraryglobal{function_ref}%
 \begin{codeblock}
 namespace std {
-  template<class... S> class function_ref;                      // \notdef
-
   template<class R, class... ArgTypes>
   class function_ref<R(ArgTypes...) @\cv{}@ noexcept(@\placeholder{noex}@)> {
   public:
