update Piwik to version 2.16 (fixes #91)

www/analytics/core/Translate/Validate/ValidateAbstract.php

@@ -1,37 +0,0 @@
-<?php
-/**
- * Piwik - Open source web analytics
- *
- * @link http://piwik.org
- * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
- *
- */
-
-namespace Piwik\Translate\Validate;
-
-/**
- */
-abstract class ValidateAbstract
-{
-    protected $message = null;
-
-    /**
-     * Returns if the given translations are valid
-     *
-     * @param array $translations
-     *
-     * @return boolean
-     */
-    abstract public function isValid($translations);
-
-    /**
-     * Returns an array of messages that explain why the most recent isValid()
-     * call returned false.
-     *
-     * @return array
-     */
-    public function getMessage()
-    {
-        return $this->message;
-    }
-}