Rename buffer_lint_with_diagnostic to buffer_lint

compiler/rustc_builtin_macros/src/test_harness.rs

@@ -160,7 +160,7 @@ struct InnerItemLinter<'a> {
 impl<'a> Visitor<'a> for InnerItemLinter<'_> {
     fn visit_item(&mut self, i: &'a ast::Item) {
         if let Some(attr) = attr::find_by_name(&i.attrs, sym::rustc_test_marker) {
-            self.sess.psess.buffer_lint_with_diagnostic(
+            self.sess.psess.buffer_lint(
                 UNNAMEABLE_TEST_ITEMS,
                 attr.span,
                 i.id,