[master] RFR: 8314545: [Lilliput] Revert changes in zRelocate.cpp

[Roman Kennke]

We have a bunch of STS additions in zRelocate.cpp . The guidance that I've got from @fisk  is that those are not needed and may in-fact cause deadlocks. Let's remove those changes and figure out if anything else is needed to deal with ZGC sync with ObjectMonitor deflation.

Testing:
 - [ ] hotspot_gc +UCOH
 - [ ] tier1 +UCOH

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Commit messages:
 - 8314545: [Lilliput] Revert changes in zRelocate.cpp

Changes: https://git.openjdk.org/lilliput/pull/105/files
 Webrev: https://webrevs.openjdk.org/?repo=lilliput&pr=105&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314545
  Stats: 5 lines in 1 file changed: 0 ins; 5 del; 0 mod
  Patch: https://git.openjdk.org/lilliput/pull/105.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/105/head:pull/105

PR: https://git.openjdk.org/lilliput/pull/105