RFR: 8362151: Remove unnecessary ClassLoaderDataGraph friend classes

[Aleksey Shipilev]

On Mon, 14 Jul 2025 11:02:27 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   please review this trivial removal of some obsolete code related to friend declarations of deleted classes.
> 
> Testing: gha
> 
> Thanks,
>   Thomas

Marked as reviewed by shade (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/26290#pullrequestreview-3017047698