Integrated: 8339087: [lw5] remove parametric types related warnings

[Vicente Romero]

removing (commenting) a couple of warnings for now

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Commit messages:
 - adding comments
 - 8339087: [lw5] remove parametric types related warnings

Changes: https://git.openjdk.org/valhalla/pull/1224/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1224&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339087
  Stats: 4 lines in 2 files changed: 2 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/valhalla/pull/1224.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1224/head:pull/1224

PR: https://git.openjdk.org/valhalla/pull/1224