[lworld] RFR: 8378184: [lworld] JDK - Cleanup accidental diffs with master - step 1

[Chen Liang]

Reduces some noisy diff with mainline jdk-27+10, checked with Intellij IDEA's Git -> Compare With Branch/Tag on a directory. Some are vestiges of older prototypes.

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Commit messages:
 - 8378184: [lworld] JDK - Cleanup accidental diffs with master - step 1

Changes: https://git.openjdk.org/valhalla/pull/2171/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2171&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8378184
  Stats: 101 lines in 27 files changed: 6 ins; 61 del; 34 mod
  Patch: https://git.openjdk.org/valhalla/pull/2171.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2171/head:pull/2171

PR: https://git.openjdk.org/valhalla/pull/2171