[lworld] RFR: 8376752: [lworld] clarify/organize Valhalla ProblemLists [v3]

[Daniel D. Daugherty]

> A trivial fix to clarify/organize Valhalla ProblemLists.

Daniel D. Daugherty has updated the pull request incrementally with one additional commit since the last revision:

  Remove three entries that were restored by accident.

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Changes:
  - all: https://git.openjdk.org/valhalla/pull/2007/files
  - new: https://git.openjdk.org/valhalla/pull/2007/files/6c95206c..19e72884

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=2007&range=02
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=2007&range=01-02

  Stats: 3 lines in 2 files changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/2007.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2007/head:pull/2007

PR: https://git.openjdk.org/valhalla/pull/2007