RFR: 8254965: Remove unused Matcher::_ruleName and make ruleName non-product

[Vladimir Kozlov]

On Mon, 19 Oct 2020 18:28:02 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> > _mist_clone[] and _swallowed[] (which should be boolean)
> 
> Yeah, I was surprised to see `char[]` rather than `bool[]` too (but apparently `sizeof(bool) >= sizeof(char)`). Perhaps
> we could profitably generate these boolean arrays as constexpr'd `BitMap`s at some point.
> > Looks like ruleName[] is not use in product but again it is useful for debugging product VM.
> 
> Ok, I'll repurpose this RFE to remove the `Matcher::_ruleName` field then, shall I?

Sorry, I mean regName[].
ruleName[] is what you want to remove now.

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PR: https://git.openjdk.java.net/jdk/pull/722