Integrated: 8324980: [lworld] removing dead code plus gratuitous differences with jdk/master

[Vicente Romero]

removing differences originated from old, dead code, making preparations to simplify a future merge with jdk/master

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Commit messages:
 - 8324980: [lworld] removing dead code plus gratuitous differences with jdk/master

Changes: https://git.openjdk.org/valhalla/pull/983/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=983&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324980
  Stats: 40 lines in 7 files changed: 1 ins; 24 del; 15 mod
  Patch: https://git.openjdk.org/valhalla/pull/983.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/983/head:pull/983

PR: https://git.openjdk.org/valhalla/pull/983