[stubs] Port LoadFunctionPrototypeStub to CSA

src/ic/handler-compiler.h

Index: src/ic/handler-compiler.h
diff --git a/src/ic/handler-compiler.h b/src/ic/handler-compiler.h
index 65f6fbbef3e873ecbd530cdf24fa6c56e365b212..a37375abfb2d69c9bde12611549ab16ab7b8f992 100644
--- a/src/ic/handler-compiler.h
+++ b/src/ic/handler-compiler.h
@@ -158,12 +158,6 @@ class NamedLoadHandlerCompiler : public PropertyHandlerCompiler {
                           no_reg);
   }
 
-  static void GenerateLoadFunctionPrototype(MacroAssembler* masm,
-                                            Register receiver,
-                                            Register scratch1,
-                                            Register scratch2,
-                                            Label* miss_label);
-
   // These constants describe the structure of the interceptor arguments on the
   // stack. The arguments are pushed by the (platform-specific)
   // PushInterceptorArguments and read by LoadPropertyWithInterceptorOnly and