Clears all callback functions registered by register_next_step_handler().

        :param message:     The message for which we want to handle new message after that in same chat.

def clear_step_handler(self, message):
        """
        Clears all callback functions registered by register_next_step_handler().

        :param message:     The message for which we want to handle new message after that in same chat.
        """
        chat_id = message.chat.id
        self.clear_step_handler_by_chat_id(chat_id)