[lworld] Integrated: 8288084: [lw4] Tier1 hotspot runtime test ClassHierarchyTest.java fails

[Srikanth Adayapalam]

This test is still expecting IdentityObject in the class hierarchy. The changes made for JDK-8245216 need to be reversed.

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Commit messages:
 - 8288084: [lw4] Tier1 hotspot runtime test ClassHierarchyTest.java fails

Changes: https://git.openjdk.java.net/valhalla/pull/707/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=707&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288084
  Stats: 9 lines in 1 file changed: 0 ins; 5 del; 4 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/707.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/707/head:pull/707

PR: https://git.openjdk.java.net/valhalla/pull/707