RFR: 8205137: Remove Applet support from SwingSet2

Wed Sep 8 22:34:57 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)

Probably the README in the "jdk/src/demo/share/" should be updated as well?
This block looks outdated:

In some cases, the default security settings may block an execution
of demo applets in a browser. To adjust the security settings, please
refer to the following resource:

http://java.com/en/download/help/java_blocked.xml

Some demo applets need to be accessed through the HTTP or HTTPS
protocols to enable access to the required resources.

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