RFR: 8351567: Jar Manifest test ValueUtf8Coding produces misleading diagnostic output

[Iris Clark]

On Mon, 10 Mar 2025 18:06:43 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> Remove misleading/invalid diagnostic output from the JAR manifest test ValueUtf8Coding.java.
> 
> The Manifest binary stream is not a well formed UTF-8 string due to the inserted continuation characters used for lines longer than 70 characters..

Marked as reviewed by iris (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/23971#pullrequestreview-2671975916