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

[Zoltan Somogyi]

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.

Zoltan.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Log.bio
Type: application/octet-stream
Size: 396 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20240413/803393b4/attachment-0002.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: DIFF.bio
Type: application/octet-stream
Size: 28764 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20240413/803393b4/attachment-0003.obj>