idl_compiler: Remove __getstate__ and __setstate__ from IdlArgument

third_party/WebKit/Source/bindings/scripts/idl_definitions.py

Index: third_party/WebKit/Source/bindings/scripts/idl_definitions.py
diff --git a/third_party/WebKit/Source/bindings/scripts/idl_definitions.py b/third_party/WebKit/Source/bindings/scripts/idl_definitions.py
index 1428577ab8d75419bc87450e5b6505132108ffed..95006780d7a86c881725b4764acddda8bf4c3ade 100644
--- a/third_party/WebKit/Source/bindings/scripts/idl_definitions.py
+++ b/third_party/WebKit/Source/bindings/scripts/idl_definitions.py
@@ -668,14 +668,6 @@ class IdlArgument(TypedObject):
             else:
                 raise ValueError('Unrecognized node class: %s' % child_class)
 
-    def __getstate__(self):
-        # FIXME: Return a picklable object which has enough information to
-        # unpickle.
-        return {}
-
-    def __setstate__(self, state):
-        pass
-
     def accept(self, visitor):
         visitor.visit_argument(self)