private static void doRemovePreference(String[] programArgs,
ClientRecommender recommender,
TranslatingRecommender translatingRecommender) throws TasteException {
if (programArgs.length != 3) {
throw new ArgumentValidationException("args are userID itemID");
}
if (translatingRecommender == null) {
long userID = Long.parseLong(unquote(programArgs[1]));
long itemID = Long.parseLong(unquote(programArgs[2]));
recommender.removePreference(userID, itemID);