ART: Remove redundant MoveInstructionBefore method

Change-Id: If53d7011197cc6b9c1702a3d98ef11b59eb76f0c
diff --git a/compiler/optimizing/nodes_x86.h b/compiler/optimizing/nodes_x86.h
index c3696b5..fa47976 100644
--- a/compiler/optimizing/nodes_x86.h
+++ b/compiler/optimizing/nodes_x86.h
@@ -26,6 +26,8 @@
   HX86ComputeBaseMethodAddress()
       : HExpression(Primitive::kPrimInt, SideEffects::None(), kNoDexPc) {}
 
+  bool CanBeMoved() const OVERRIDE { return true; }
+
   DECLARE_INSTRUCTION(X86ComputeBaseMethodAddress);
 
  private: