Remove outdated RVV 2.0 notice from document #1402

[camel-cdr]

For reasons I describe here, I think it's best to remove the RVV 2.0 version notice from the specification, there does seem to be no indication that what the notice says is actually planned.

I replaced it with text derived from the Vector Crypto Introduction, both should ideally be reworded before an actual release, but this should remove the confusion for now.

See also past discussion on the v-spec repo: riscvarchive/riscv-v-spec#946

It sounded like the change would be merged, but the repo was archived before that got through. My understanding is that the riscv-v-spec repo wasn't supposed to be a source of truth, hence it was archived.

[aswaterman]

I'm dropping the extensive warning about what Ratified means, as it's a global property of RVIA policy, not of this extension. Yes, I understand there's a tortured history in this case, but I'd rather not flog a dead horse.

[aswaterman]

Looking at the other extensions (with the exception of vector crypto), the consistent thing to do is to remove any draft/freeze warnings and update the preface. That's what we'll do here.

57ec29a

[camel-cdr]

I'm dropping the extensive warning about what Ratified means, as it's a global property of RVIA policy, not of this extension

Exactly, that was the motivation behind this change. Everything I've heard from RVI in any official capacity other than this NOTE referred to RVV 1.0 being ratified. Maybe I've missed some part of the communication.