diff --git a/lib/Alchemy/Phrasea/WorkerManager/Configuration/Config.php b/lib/Alchemy/Phrasea/WorkerManager/Configuration/Config.php
deleted file mode 100644
index dfd876ad9c..0000000000
--- a/lib/Alchemy/Phrasea/WorkerManager/Configuration/Config.php
+++ /dev/null
@@ -1,33 +0,0 @@
-<?php
-
-namespace Alchemy\Phrasea\WorkerManager\Configuration;
-
-class Config
-{
-    const WORKER_DATABASE_FILE = 'worker.db';
-
-    public static function getPluginDatabaseFile()
-    {
-        $dbDir = realpath(dirname(__FILE__) . "/../") . "/Db" ;
-
-        if (!is_dir($dbDir)) {
-            mkdir($dbDir, 0755, true);
-        }
-
-        $dbFile = $dbDir . '/' . self::WORKER_DATABASE_FILE;
-
-        if (!is_file($dbFile)) {
-            file_put_contents($dbFile, '');
-        }
-
-        return $dbFile;
-    }
-
-    public static function getWorkerSqliteConnection()
-    {
-        $db_conn = 'sqlite:'. self::getPluginDatabaseFile();
-        $pdo = new \PDO($db_conn);
-
-        return $pdo;
-    }
-}
diff --git a/lib/Alchemy/Phrasea/WorkerManager/Db/.gitkeep b/lib/Alchemy/Phrasea/WorkerManager/Db/.gitkeep
deleted file mode 100644
index e69de29bb2..0000000000