RFR: 8328746: Remove unused imports in demo apps

[Kevin Rushforth]

On Wed, 27 Mar 2024 14:51:35 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

> I would highly suggest to use the current guidelines in CONTRIBUTING.md
> 
> ```
> * Don't worry too much about import order. Try not to change it but don't worry about fighting your IDE to stop it from doing so.
> ```

Since this is the existing guideline, and there isn't clear agreement on a new guideline, this seems like the best approach. We can revisit this after the current set of PRs are integrated if there is a desire to do so.

> as not doing so generates unnecessary (in my opinion) discussion.

And I think that it is the _absence_ of at least a soft guideline that generates the discussion, but we can table the discussion for now.

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PR Comment: https://git.openjdk.org/jfx/pull/1420#issuecomment-2029799109