Revert "ART: Reference.getReferent intrinsic for x86 and x86_64"

Fails heap poisoning configuration.

This reverts commit afdc97ebcb4e58afb7cf54d846d30314e6499d83.

Change-Id: I50e53756a2b85059b89cfb8950f8c9e2b032743c
8 files changed