Remove phones from blacklist

@param callback
@param phones
function smsDeletePhonesFromBlacklist(callback, phones) {
    if ((phones === undefined) || (!phones.length)) {
        return callback(returnError("Empty phones"));
    }
    var data = {
        'phones': JSON.stringify(phones),
    }

    sendRequest('sms/black_list', 'DELETE', data, true, callback);
}