[stubs] Remove dead IncStub and DecStub

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 734291c6e6de1c9bb967e8b827ed9f43419f36f4..77e4f2aa55264c21772d8353e1182b2594035860 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -93,10 +93,8 @@ class Node;
   V(MultiplyWithFeedback)                     \
   V(DivideWithFeedback)                       \
   V(ModulusWithFeedback)                      \
-  V(Inc)                                      \
   V(InternalArrayNoArgumentConstructor)       \
   V(InternalArraySingleArgumentConstructor)   \
-  V(Dec)                                      \
   V(ElementsTransitionAndStore)               \
   V(FastCloneRegExp)                          \
   V(FastCloneShallowArray)                    \
@@ -730,22 +728,6 @@ class ModulusWithFeedbackStub final : public TurboFanCodeStub {
                                                     TurboFanCodeStub);
 };
 
-class IncStub final : public TurboFanCodeStub {
- public:
-  explicit IncStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}
-
-  DEFINE_CALL_INTERFACE_DESCRIPTOR(CountOp);
-  DEFINE_TURBOFAN_UNARY_OP_CODE_STUB_WITH_FEEDBACK(Inc, TurboFanCodeStub);
-};
-
-class DecStub final : public TurboFanCodeStub {
- public:
-  explicit DecStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}
-
-  DEFINE_CALL_INTERFACE_DESCRIPTOR(CountOp);
-  DEFINE_TURBOFAN_UNARY_OP_CODE_STUB_WITH_FEEDBACK(Dec, TurboFanCodeStub);
-};
-
 class StoreInterceptorStub : public TurboFanCodeStub {
  public:
   explicit StoreInterceptorStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}