RFR: 8328746: Remove unused imports in demo apps

[Kevin Rushforth]

On Thu, 21 Mar 2024 21:50:37 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

> Using Eclipse IDE to remove unused imports in **demo apps** (3D, Ensemble, etc.) and update the copyright year to 2024. Using wildcard for more than 10 static imports.
> 
> 
> --
> 
> This is a trivial change (though fairly large), 1 reviewer is probably enough.

This PR looks good.

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Marked as reviewed by kcr (Lead).

PR Review: https://git.openjdk.org/jfx/pull/1420#pullrequestreview-1971320748