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

[Calvin Cheung]

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.

Looks good.

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Marked as reviewed by ccheung (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/25518#pullrequestreview-2879299604