[lworld] Integrated: 8334340: [lworld] javac code clean-up

[Vicente Romero]

remove old code and unnecessary differences with jdk/master

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Commit messages:
 - removing more diffs
 - Merge branch 'lworld' into JDK-8334340
 - 8334340: [lworld] javac code clean-up

Changes: https://git.openjdk.org/valhalla/pull/1139/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1139&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334340
  Stats: 33 lines in 10 files changed: 8 ins; 15 del; 10 mod
  Patch: https://git.openjdk.org/valhalla/pull/1139.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1139/head:pull/1139

PR: https://git.openjdk.org/valhalla/pull/1139