RFR: 8334580: Deprecate no-arg constructor BasicSliderUI() for removal [v4]

[Kevin Rushforth]

On Mon, 24 Jun 2024 16:28:36 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

>> The no-arg constructor BasicSliderUI() was added under [JDK-8250852](https://bugs.openjdk.org/browse/JDK-8250852) by mistake. This constructor should be deprecated for removal in future release
>
> Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   javadoc fix

Marked as reviewed by kcr (Author).

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PR Review: https://git.openjdk.org/jdk/pull/19819#pullrequestreview-2136280195