RFR: 8266519: Cleanup resolve() leftovers from BarrierSet et al

[Roman Kennke]

Shenandoah used to require a way to resolve oops, but it's long unused the the corresponding code in the access machinery is obsolete. Let's remove it.

Testing:
 - [x] hotspot_gc_shenandoah
 - [ ] tier1
 - [ ] tier2

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Commit messages:
 - 8266519: Cleanup resolve() leftovers from BarrierSet et al

Changes: https://git.openjdk.java.net/jdk/pull/3862/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3862&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266519
  Stats: 41 lines in 4 files changed: 0 ins; 40 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3862.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3862/head:pull/3862

PR: https://git.openjdk.java.net/jdk/pull/3862