hide map for Character groups Quest Stations when there are no stations

www/analytics/core/Updates/2.2.0-b15.php

@@ -0,0 +1,27 @@
+<?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\Updates;
+
+use Piwik\Db;
+use Piwik\Filesystem;
+use Piwik\Updates;
+
+/**
+ */
+class Updates_2_2_0_b15 extends Updates
+{
+    static function update()
+    {
+        // This was added in the beta cycle and then removed
+        // if the file is there, it can cause bugs (we don't have an archiver in VisitFrequency anymore)
+        $path = PIWIK_INCLUDE_PATH . '/plugins/VisitFrequency/Archiver.php';
+        if (file_exists($path)) {
+            @unlink($path);
+        }
+    }
+}