[lworld] RFR: 8377242: [lworld] Remove _has_inlined_fields member from ClassFileParser

[Casper Norrbin]

Hi everyone,

This PR removes the redundant `ClassFileParser::_has_inlined_fields` member from ClassFileParser. The value stored in `_has_inlined_fields` is derived directly from `FieldLayoutInfo` and is only used for a getter. Since `ClassFileParser` already retains this in `_layout_info`, a separate duplicate member is unnecessary. With this change, the getter returns the value directly from the stored `FieldLayoutInfo`, removing the extra member while preserving existing behavior.

Testing:
- Tier 1

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Commit messages:
 - remove _has_inlined_fields in ClassFileParser

Changes: https://git.openjdk.org/valhalla/pull/2047/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2047&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8377242
  Stats: 4 lines in 2 files changed: 0 ins; 3 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/2047.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2047/head:pull/2047

PR: https://git.openjdk.org/valhalla/pull/2047