RFR: 8251358: Clean up Access configuration after Shenandoah barrier change

[Aditya Mandaleeka]

On Mon, 14 Sep 2020 05:16:11 GMT, Aditya Mandaleeka <adityam at openjdk.org> wrote:

> This change removes a bunch of code that is no longer necessary after the Shenandoah barrier changes, including the
> `SUPPORT` macros in barrierSetConfig.hpp and code using them. `Access::resolve` and associated code have also been
> removed, and callers have been modified.  Testing done:
> tier1
> hotspot_gc_shenandoah

@kimbarrett Can you please take a look when you have time?

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PR: https://git.openjdk.java.net/jdk/pull/146