Withdrawn: 8308596: Revert the "keepAlive" workaround from CDS tests

[Calvin Cheung]

On Wed, 31 May 2023 16:18:59 GMT, Calvin Cheung <ccheung at openjdk.org> wrote:

> This fix reverts the [changeset](https://github.com/openjdk/jdk/commit/0dbe4c5d516a5e43934cb18f3becaf2a7f90999f#diff-4184777f000a8c9284612862ed6169b85030d15fe5ee54c9694e0649613f9d8c) for [JDK-8278131](https://bugs.openjdk.org/browse/JDK-8278131) which was a workaround for the more aggressive sweeping of the code cache issue in an early implementation of loom. The workaround is no longer necessary.
> 
> Testing:
> 
> - locally on linux-x64 with a promoted loom build
> - tiers 1,2,4

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jdk/pull/14249