[regexp] Remove remainder of native RegExpExecStub

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index b3269eade1c9531a59f5c43f8ca4bb4670ce7fb2..bfacf6c62cc5682df71cf992129185ff62a81d80 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -45,7 +45,6 @@ class Node;
   V(MathPow)                                  \
   V(ProfileEntryHook)                         \
   V(RecordWrite)                              \
-  V(RegExpExec)                               \
   V(StoreBufferOverflow)                      \
   V(StoreSlowElement)                         \
   V(SubString)                                \
@@ -1136,15 +1135,6 @@ class JSEntryStub : public PlatformCodeStub {
   DEFINE_PLATFORM_CODE_STUB(JSEntry, PlatformCodeStub);
 };
 
-
-class RegExpExecStub: public PlatformCodeStub {
- public:
-  explicit RegExpExecStub(Isolate* isolate) : PlatformCodeStub(isolate) { }
-
-  DEFINE_CALL_INTERFACE_DESCRIPTOR(RegExpExec);
-  DEFINE_PLATFORM_CODE_STUB(RegExpExec, PlatformCodeStub);
-};
-
 // TODO(bmeurer/mvstanton): Turn CallConstructStub into ConstructICStub.
 class CallConstructStub final : public PlatformCodeStub {
  public: