Revert "X86: VarHandle.get() for reference type static fields."

This reverts commit a18ed1bcdb665320c901e1c07b9f92af186077d7.

Reason for revert: Fails 712-varhandle-invocations for art-heap-poisoning and art-read-barrier-heap-poisoning in master-art-host

Change-Id: I703923e2c7b5bc07c2270d0a0328bac8d02b655d
3 files changed