Kill obsolete HLoadExternalArrayPointer instruction.

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 76c831572309f3fc1d7d21671ba7387b66c9bcc1..98d66fcd8896985d7516b44a5043de6d75efe309 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1985,13 +1985,6 @@ LInstruction* LChunkBuilder::DoLoadRoot(HLoadRoot* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoLoadExternalArrayPointer(
-    HLoadExternalArrayPointer* instr) {
-  LOperand* input = UseRegisterAtStart(instr->value());
-  return DefineAsRegister(new(zone()) LLoadExternalArrayPointer(input));
-}
-
-
 LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   ASSERT(instr->key()->representation().IsInteger32());
   ElementsKind elements_kind = instr->elements_kind();