def delete_value(self, name, local=True, scope=SYSTEM_SCOPE):
        """
        Delete a value from a dictionary which is local to this class.
        """
        name = self._get_full_key_name(name=name, local=local)

        if name not in self._datastore_items:
            return False

        del self._datastore_items[name]
        return True

        Delete a value from a dictionary which is local to this class.
        
st2tests/st2tests/mocks/datastore.py