RFR: 8205137: Remove Applet support from SwingSet2 [v3]

[Phil Race]

On Fri, 10 Sep 2021 23:34:19 GMT, Alisen Chung <github.com+90066231+alisenchung at openjdk.org> wrote:

>> removed support for running demo from applet for J2Ddemo and SwingSet2
>> same PR as 8205137: Remove Applet support from SwingSet2 #5400 (changed branch name)
>
> Alisen Chung has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8205137: Reverted accidental code reformat
>   
>   Reviewed-by: alichung

Marked as reviewed by prr (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/5401