[intrinsics] Nuke the %_StringCharFromCode intrinsic.

src/full-codegen/arm64/full-codegen-arm64.cc

Index: src/full-codegen/arm64/full-codegen-arm64.cc
diff --git a/src/full-codegen/arm64/full-codegen-arm64.cc b/src/full-codegen/arm64/full-codegen-arm64.cc
index 302910b312a896d570a90195d7ff912c01668e5f..a64a9728fec2ca84c86e369a9442553a18c37202 100644
--- a/src/full-codegen/arm64/full-codegen-arm64.cc
+++ b/src/full-codegen/arm64/full-codegen-arm64.cc
@@ -2685,28 +2685,6 @@ void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
 }
 
 
-void FullCodeGenerator::EmitStringCharFromCode(CallRuntime* expr) {
-  ZoneList<Expression*>* args = expr->arguments();
-  DCHECK(args->length() == 1);
-
-  VisitForAccumulatorValue(args->at(0));
-
-  Label done;
-  Register code = x0;
-  Register result = x1;
-
-  StringCharFromCodeGenerator generator(code, result);
-  generator.GenerateFast(masm_);
-  __ B(&done);
-
-  NopRuntimeCallHelper call_helper;
-  generator.GenerateSlow(masm_, call_helper);
-
-  __ Bind(&done);
-  context()->Plug(result);
-}
-
-
 void FullCodeGenerator::EmitStringCharCodeAt(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 2);