[lworld] RFR: 8375374: [lworld] Remove some traces of <vnew>

[Stefan Johansson]

Please review this small change to remove a few traces still left of no longer used `<vnew>`.

After this change, the only reference left to `<vnew>` is in `verifierTests.jcod` used by the test `VerifierInlineTypes`. I'm uncertain how to handle that so I will leave that to someone else, but filed [JDK-8375373](https://bugs.openjdk.org/browse/JDK-8375373) to keep track of it.

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Commit messages:
 - 8375374: [lworld] Remove some traces of <vnew>

Changes: https://git.openjdk.org/valhalla/pull/1912/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1912&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8375374
  Stats: 13 lines in 5 files changed: 0 ins; 8 del; 5 mod
  Patch: https://git.openjdk.org/valhalla/pull/1912.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1912/head:pull/1912

PR: https://git.openjdk.org/valhalla/pull/1912