[m-rev.] for post-commit review: simplify representation of builtin ops

[Julien Fischer]

On Sat, 13 Apr 2024, Zoltan Somogyi wrote:

> I have bootchecked this in the csharp grade as well as
> asm_fast.gc and hlc.gc.
>
> Would anyone object to either commenting out the whole
> of bytecode.m and  bytecode_gen.m, or deleting the whole
> bytecode backend entirely? It is a nuisance to maintain,
> and not likely to be ever helpful.

I think you just delete it outright.

I will take a a look at the diff this evening.

Julien.