[m-rev.] for post-commit review: simplify printing class decls

[Julien Fischer]

On Sat, 12 Feb 2022, Zoltan Somogyi wrote:

> For review by anyone.
>
> Next, I intend to take the code for printing the kinds
> of class decls that we used get with hl grades (which we
> deleted in april 2020) but which we don't get with
> hlc grades, and replace them with calls to unexpected,
> leaving the old code as comments and/or as dead
> predicates with consider_used pragmas.
> If you object to this, please speak up.

I don't object, but I do have a query.  Is --dump-mlds still using that
code when printing MLDS dumps for the Java or C# grades?

The diff is fine.

Julien.