Remove unused code for alternative topic selection strategy

protected TopicSelectionStrategy topicSelectionStrategy() {
        //TODO author=Horia Chiorean date=04/11/2016 description=implement this fully once the changes for MySQL are merged
        //String value = config.getString(PostgresConnectorConfig.TOPIC_SELECTION_STRATEGY);
        //return PostgresConnectorConfig.TopicSelectionStrategy.parse(value);
        return PostgresConnectorConfig.TopicSelectionStrategy.TOPIC_PER_TABLE;
    }