RFR: 8270929: Obsolete the FilterSpuriousWakeups flag in JDK 19

[Robbin Ehn]

On Thu, 16 Dec 2021 23:03:17 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Please review this small change to obsolete the `FilterSpuriousWakeups` flag that was deprecated in JDK 18.
> 
> There are no associated doc changes, nor test changes.
> 
> Testing: tier1-5 builds (in progress)
> 
> Thanks,
> David

Ship it!

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Marked as reviewed by rehn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6871