[runtime] Remove the unused weird %Likely and %Unlikely intrinsics.

src/runtime/runtime-internal.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
 #include "src/debug/debug.h"
@@ skipping 353 matching lines @@
   DCHECK(args.length() == 1);
   CONVERT_ARG_CHECKED(String, name, 0);
 
   if (FLAG_native_code_counters) {
     StatsCounter(isolate, name->ToCString().get()).Increment();
   }
   return isolate->heap()->undefined_value();
 }
 
 
-RUNTIME_FUNCTION(Runtime_Likely) {
-  DCHECK(args.length() == 1);
-  return args[0];
-}
-
-
-RUNTIME_FUNCTION(Runtime_Unlikely) {
-  DCHECK(args.length() == 1);
-  return args[0];
-}
-
-
 RUNTIME_FUNCTION(Runtime_HarmonyToString) {
   // TODO(caitp): Delete this runtime method when removing --harmony-tostring
   return isolate->heap()->ToBoolean(FLAG_harmony_tostring);
 }
 
 
 RUNTIME_FUNCTION(Runtime_GetTypeFeedbackVector) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_CHECKED(JSFunction, function, 0);
@@ skipping 45 matching lines @@
   HandleScope scope(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
   Handle<String> callsite = RenderCallSite(isolate, object);
   THROW_NEW_ERROR_RETURN_FAILURE(
       isolate, NewTypeError(MessageTemplate::kCalledNonCallable, callsite));
 }
 
 }  // namespace internal
 }  // namespace v8