RFR: 8325752: Remove badMetaWordVal

[Stefan Karlsson]

This is another artifact from the permgen removal. At some point we used to zap Metaspace with badMetaWordVal, but we don't do that anymore and therefore we should stop looking for this value.

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Commit messages:
 - 8325752: Remove badMetaWordVal

Changes: https://git.openjdk.org/jdk/pull/17833/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17833&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325752
  Stats: 7 lines in 3 files changed: 0 ins; 7 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17833.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17833/head:pull/17833

PR: https://git.openjdk.org/jdk/pull/17833