RFR: 8329320: Simplify awt/print/PageFormat/NullPaper.java test

[Phil Race]

On Fri, 29 Mar 2024 12:45:36 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

> Remove all the leftovers of the _"standard instructions" machinery_ from the `NullPaper.java` test.
> 
> The test code consists of two lines now: concise and clear.

Marked as reviewed by prr (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/18547#pullrequestreview-1972579654