[regexp] Remove remainder of native RegExpExecStub

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index 71fbb1dbab93363ab2650bb8c53f3a5db12cbddb..49dd7c7653e4ba88bbeaa972cb702a389136453b 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -232,12 +232,6 @@ Callable CodeFactory::NumberToString(Isolate* isolate) {
 }
 
 // static
-Callable CodeFactory::RegExpExec(Isolate* isolate) {
-  RegExpExecStub stub(isolate);
-  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
-}
-
-// static
 Callable CodeFactory::StringFromCharCode(Isolate* isolate) {
   Handle<Code> code(isolate->builtins()->StringFromCharCode());
   return Callable(code, BuiltinDescriptor(isolate));