RFR: 8358035: Remove unused `compute_fingerprint` declaration in `ClassFileStream`

[duke]

On Thu, 29 May 2025 08:09:14 GMT, Qizheng Xing <qxing at openjdk.org> wrote:

> In JDK-8264805 (part of JEP 410), the implementation of `compute_fingerprint` was removed from `ClassFileStream`, but its declaration was left in place, which was unused and should be removed. This patch removes that declaration.

@MaxXSoft 
Your change (at version 7165322d735e83c7c6f8d647b282b59139ea72ca) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk/pull/25518#issuecomment-2933067884