[ic] Delete old KeyedLoadIC code

src/ic/ic.h

Index: src/ic/ic.h
diff --git a/src/ic/ic.h b/src/ic/ic.h
index a854ee5bc95fe8ab1a85b7855bd9118bceec58be..22d3e9cc0244fe1bfb5842efd29fd40f4acb48ef 100644
--- a/src/ic/ic.h
+++ b/src/ic/ic.h
@@ -346,10 +346,6 @@ class KeyedLoadIC : public LoadIC {
   // Code generator routines.
   static void GenerateMiss(MacroAssembler* masm);
   static void GenerateRuntimeGetProperty(MacroAssembler* masm);
-  static void GenerateMegamorphic(MacroAssembler* masm);
-
-  static Handle<Code> ChooseMegamorphicStub(Isolate* isolate,
-                                            ExtraICState extra_state);
 
   static void Clear(Isolate* isolate, Code* host, KeyedLoadICNexus* nexus);