RFR: 8205137: Remove Applet support from SwingSet2

Thu Sep 9 00:27:58 UTC 2021

On Tue, 7 Sep 2021 22:08:58 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)

@azuev-java  please review

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