Remove HLoadElements instruction and replace with use of more general HLoadNamedField.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 094f5ed346c076f39077fdd1f049083d798fecd6..b8b600d4909357a81d28581037569a2ecfbe04fe 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -2065,12 +2065,6 @@ LInstruction* LChunkBuilder::DoLoadFunctionPrototype(
 }
 
 
-LInstruction* LChunkBuilder::DoLoadElements(HLoadElements* instr) {
-  LOperand* input = UseRegisterAtStart(instr->value());
-  return DefineAsRegister(new(zone()) LLoadElements(input));
-}
-
-
 LInstruction* LChunkBuilder::DoLoadExternalArrayPointer(
     HLoadExternalArrayPointer* instr) {
   LOperand* input = UseRegisterAtStart(instr->value());