RFR: 8349509: [macos] Clean up macOS dead code in jpackage

[Alexey Semenyuk]

On Thu, 6 Feb 2025 23:19:16 GMT, Alexander Matveev <almatvee at openjdk.org> wrote:

> - Removed unused `INSTALLER_SUFFIX` bundler param.
> - Removed unreachable if branch in `MacAppImageBuilder`.

Marked as reviewed by asemenyuk (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/23504#pullrequestreview-2600269969