RFR: 8280482: Window transparency bug on Linux [v2]

[Tejesh R]

On Fri, 21 Jul 2023 09:40:33 GMT, Alexander Zvegintsev <azvegint at openjdk.org> wrote:

>> Didn't check on other systems, since the fix is in X11.
>
> So we should check this, just in case other systems have similar issues.
> (and remove the requires tag if there are no issues).

I verified with Windows and Mac, not issue found. Removing the linux specific tag and other unused tag.

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PR Review Comment: https://git.openjdk.org/jdk/pull/14825#discussion_r1270539216