[stubs] Remove dead IncStub and DecStub

src/code-factory.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/code-factory.h"
 
 #include "src/bootstrapper.h"
 #include "src/ic/ic.h"
 
 namespace v8 {
@@ skipping 240 matching lines @@
 TFS_BUILTIN(NewUnmappedArgumentsElements)
 TFS_BUILTIN(NewRestParameterElements)
 TFS_BUILTIN(PromiseHandleReject)
 TFS_BUILTIN(GetSuperConstructor)
 TFS_BUILTIN(StringCharAt)
 TFS_BUILTIN(StringCharCodeAt)
 
 #undef TFS_BUILTIN
 
 // static
-Callable CodeFactory::Inc(Isolate* isolate) {
-  IncStub stub(isolate);
-  return make_callable(stub);
-}
-
-// static
-Callable CodeFactory::Dec(Isolate* isolate) {
-  DecStub stub(isolate);
-  return make_callable(stub);
-}
-
-// static
 Callable CodeFactory::StringAdd(Isolate* isolate, StringAddFlags flags,
                                 PretenureFlag pretenure_flag) {
   StringAddStub stub(isolate, flags, pretenure_flag);
   return make_callable(stub);
 }
 
 // static
 Callable CodeFactory::StringCompare(Isolate* isolate, Token::Value token) {
   switch (token) {
     case Token::EQ:
@@ skipping 231 matching lines @@
 }
 
 // static
 Callable CodeFactory::FunctionPrototypeBind(Isolate* isolate) {
   return Callable(isolate->builtins()->FunctionPrototypeBind(),
                   BuiltinDescriptor(isolate));
 }
 
 }  // namespace internal
 }  // namespace v8