RFR: 8368345: Remove leftover includes of strongRootsScope.hpp

[duke]

On Mon, 22 Sep 2025 23:54:09 GMT, Francesco Andreuzzi <fandreuzzi at openjdk.org> wrote:

> #27336 and #27385 replaced some `StrongRootsScope` usages with `ThreadsClaimTokenScope`. Some includes to `strongRootsScope.hpp` can now be removed.
> 
> This looks trivial to me.
> 
> Passes tier1.

@fandreuz 
Your change (at version 964d646d29d6c178221cd488aeed1478d0f3b74f) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk/pull/27442#issuecomment-3323138946