[master] RFR: OMWorld: Cleanup ObjectSynchronizer::enter_fast_impl

Mon Apr 22 12:09:48 UTC 2024

Cleanup of `ObjectSynchronizer::enter_fast_impl` after `LM_LIGHTWEIGHT` and `LM_PLACEHOLDER` got merged.

This commit is currently based on ffc4c2fd5ba1c28432a5d5e84b8ada95fba7eeb8 without a merge. So GHA is not tested with lilliput. As long as this is mergable without conflicts (and no manual merge is performed) it will also be possible to move this commit down below lilliput on-top of OMWorld directly.

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Commit messages:
 - OMWorld: Cleanup ObjectSynchronizer::enter_fast_impl

Changes: https://git.openjdk.org/lilliput/pull/156/files
  Webrev: https://webrevs.openjdk.org/?repo=lilliput&pr=156&range=00
  Stats: 56 lines in 1 file changed: 1 ins; 54 del; 1 mod
  Patch: https://git.openjdk.org/lilliput/pull/156.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/156/head:pull/156

PR: https://git.openjdk.org/lilliput/pull/156