RFR: JDK-8306462: Remove NMT gtests that test dead-block-printing

[Ioi Lam]

On Wed, 19 Apr 2023 16:05:51 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> [JDK-8304815](https://bugs.openjdk.org/browse/JDK-8304815) introduced using NMT for more precise hs_err file printing. It came with gtests that test correct live- and dead-block printing.
> 
> Live/dead-block printing: given a pointer into or very nearby live/dead malloced block, it tests that the printout identifies that block correctly.
> 
> Unfortunately, the dead-block-printing tests are prone to intermittent errors, typically on platforms I don't own and cannot test. These tests are not worth the maintenance burden and should just be removed.

LGTM

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Marked as reviewed by iklam (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13539#pullrequestreview-1393249424