RFR: 8352275: Clean up dead code in jpackage revealed with improved negative test coverage

[Alexander Matveev]

On Tue, 18 Mar 2025 15:25:40 GMT, Alexey Semenyuk <asemenyuk at openjdk.org> wrote:

> Follow up code cleanup for https://github.com/openjdk/jdk/pull/23936 PR.
> 
> Details on cleanup actions are given in commit descriptions.

Looks good.

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Marked as reviewed by almatvee (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24099#pullrequestreview-2696401898