RFR: 8273062: Generation::refs_discovery_is_xxx functions are unused

[Albert Mingkun Yang]

On Fri, 27 Aug 2021 08:47:24 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> Please review this trivial cleanup, removing a couple of unused virtual
> function declarations from the Generation class:
> 
>   virtual bool refs_discovery_is_atomic() const { return true;  }
>   virtual bool refs_discovery_is_mt()     const { return false; }
> 
> These functions are not called or overridden.
> 
> Testing:
> local (linux-x64) build.

LGTM and trivial.

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Marked as reviewed by ayang (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5275