Drop raw values from declarations

[reitzig]

This may be controversial, but I think raw values of enums are designed to be internal: we use the enum to have the abstraction after all.

So instead of

case myEnumCase = "my-enum-case-for-REST"

I'd like to see only the case name (unless the minimum access level is set to internal or lower).

[johnfairh]

That does make sense to me. I noticed though that Xcode quick help does display the raw values -- I think jazzy normally tries to follow that lead.

[reitzig]

I'm fine with "show as much as possible" for internal developer doc. But shipping a closed-source product causes different needs. While I don't imagine I can really hide stuff from clients, showing them as little as possible in the doc should help preventing them from developing against internals.

[johnfairh]

I've returned to this from time to time over the years: now it seems like Apple/DocC agrees: the raw value is nowhere to be found in the raw symbolgraph and is omitted from Quick Help etc etc. So I guess we should keep this one!