RFR: 8327492: Remove applet usage and update DisposeInActionEventTest.html [v8]

[Alexey Ivanov]

On Thu, 7 Mar 2024 17:00:29 GMT, Alisen Chung <achung at openjdk.org> wrote:

>> This comment also implied amending the instructions to correspond to what the test does.
>
> the test doesn't actually do any automatic checks, so i've removed that line

It kind of does.

[JDK-6299866](https://bugs.openjdk.org/browse/JDK-6299866) states NPE was thrown if a tray icon is removed from its action listener. This implies the test fails automatically if NPE is thrown.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17838#discussion_r1516561499