[crankshaft] Remove useless HCallJSFunction instruction.

src/crankshaft/arm64/lithium-arm64.cc

Index: src/crankshaft/arm64/lithium-arm64.cc
diff --git a/src/crankshaft/arm64/lithium-arm64.cc b/src/crankshaft/arm64/lithium-arm64.cc
index f040690fbdeb1b46032751e1a507b97ccc0c80da..39381d87bfdbad82283cacbafc097dd29a955bc8 100644
--- a/src/crankshaft/arm64/lithium-arm64.cc
+++ b/src/crankshaft/arm64/lithium-arm64.cc
@@ -66,13 +66,6 @@ void LBranch::PrintDataTo(StringStream* stream) {
 }
 
 
-void LCallJSFunction::PrintDataTo(StringStream* stream) {
-  stream->Add("= ");
-  function()->PrintTo(stream);
-  stream->Add("#%d / ", arity());
-}
-
-
 void LCallWithDescriptor::PrintDataTo(StringStream* stream) {
   for (int i = 0; i < InputCount(); i++) {
     InputAt(i)->PrintTo(stream);
@@ -997,16 +990,6 @@ LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoCallJSFunction(
-    HCallJSFunction* instr) {
-  LOperand* function = UseFixed(instr->function(), x1);
-
-  LCallJSFunction* result = new(zone()) LCallJSFunction(function);
-
-  return MarkAsCall(DefineFixed(result, x0), instr);
-}
-
-
 LInstruction* LChunkBuilder::DoCallWithDescriptor(
     HCallWithDescriptor* instr) {
   CallInterfaceDescriptor descriptor = instr->descriptor();