remove the special case for nonexported macro_rules! macros

Author: m-ysk

src/librustdoc/doctest.rs

@@ -1225,16 +1225,6 @@ impl<'a, 'hir, 'tcx> intravisit::Visitor<'hir> for HirCollector<'a, 'hir, 'tcx>
 
     fn visit_item(&mut self, item: &'hir hir::Item<'_>) {
         let name = match &item.kind {
-            hir::ItemKind::Macro(ref macro_def, _) => {
-                // FIXME(#88038): Non exported macros have historically not been tested,
-                // but we really ought to start testing them.
-                let def_id = item.def_id.to_def_id();
-                if macro_def.macro_rules && !self.tcx.has_attr(def_id, sym::macro_export) {
-                    intravisit::walk_item(self, item);
-                    return;
-                }
-                item.ident.to_string()
-            }
             hir::ItemKind::Impl(impl_) => {
                 rustc_hir_pretty::id_to_string(&self.map, impl_.self_ty.hir_id)
             }