RFR: 8367068: Remove redundant HttpRequest.BodyPublisher tests

[Daniel Fuchs]

On Mon, 22 Sep 2025 10:12:28 GMT, Volkan Yazici <vyazici at openjdk.org> wrote:

> Remove `HttpRequest.BodyPublisher` tests rendered redundant by [JDK-8367067] (#26876).
> 
> [JDK-8367067]: https://bugs.openjdk.org/browse/JDK-8367067

Marked as reviewed by dfuchs (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27421#pullrequestreview-3258445760