RFR: 7904025: jcstress: Remove dangling doc comments which fail build on JDK 23+

[Pavel Rappo]

See for details: https://mail.openjdk.org/pipermail/jcstress-dev/2025-June/001293.html

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Commit messages:
 - Delete dangling comments elsewhere
 - Delete comments that prevent mvn clean verify

Changes: https://git.openjdk.org/jcstress/pull/162/files
  Webrev: https://webrevs.openjdk.org/?repo=jcstress&pr=162&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7904025
  Stats: 179 lines in 18 files changed: 0 ins; 168 del; 11 mod
  Patch: https://git.openjdk.org/jcstress/pull/162.diff
  Fetch: git fetch https://git.openjdk.org/jcstress.git pull/162/head:pull/162

PR: https://git.openjdk.org/jcstress/pull/162