[lworld] RFR: 8354322: [lworld] InlineKlass::collect_fields fails to look up flat fields declared in abstract super class

[Tobias Hartmann]

The problem is that we are doing the lookup for a flat field declared in an abstract super class in the subclass and don't find it there.

Thanks,
Tobias

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Commit messages:
 - Removed imports
 - 8354322: [lworld] InlineKlass::collect_fields fails to look up flat fields declared in abstract super class

Changes: https://git.openjdk.org/valhalla/pull/1445/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1445&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354322
  Stats: 52 lines in 2 files changed: 49 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/1445.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1445/head:pull/1445

PR: https://git.openjdk.org/valhalla/pull/1445