RFR: 8282410: Remove SA ProcDebugger support

[Chris Plummer]

On Thu, 25 Aug 2022 03:31:03 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

> SA has the following source directory:
> 
> src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/proc
> 
> However, there are no references to any classes in this directory. There used to be a reference to ProcDebuggerLocal, but this reference was removed, along with the class, when solaris support was removed by [JDK-8244224](https://bugs.openjdk.org/browse/JDK-8244224). There appears to be no other need for anything in this directory now, and I believe it can be safely removed.

Yes, I think much of this was just copied when doing new ports, including RISCV64, AARCH64 and PPC64.

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PR: https://git.openjdk.org/jdk/pull/10013