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

Thu Apr 20 05:14:52 UTC 2023

[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.

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Commit messages:
 - JDK-8306462

Changes: https://git.openjdk.org/jdk/pull/13539/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13539&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306462
  Stats: 36 lines in 1 file changed: 0 ins; 36 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13539.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13539/head:pull/13539

PR: https://git.openjdk.org/jdk/pull/13539