RFR: 8275074: Cleanup unused code in JFR LeakProfiler

[Markus Grönlund]

On Mon, 11 Oct 2021 18:57:45 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> While doing some fixes for Lilliput in JFR I noticed a couple of unused code paths. Let's remove them. 
> Specifically, it's the entirety of saveRestore.hpp/cpp and a helper method in edgeUtils.hpp/cpp.
> 
> Testing:
>  - [x] tier1
>  - [x] jdk/jfr

We are so few working on JFR so we have decided that one Reviewer is ok - please go ahead.

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PR: https://git.openjdk.java.net/jdk/pull/5899