Added comment; eliminated unused property.

module/VuFind/src/VuFind/ILS/Driver/NewGenLib.php

@@ -40,8 +40,12 @@ use PDO, PDOException, VuFind\Config\Reader as ConfigReader,
  */
 class NewGenLib extends AbstractBase
 {
+    /**
+     * Database connection
+     *
+     * @var PDO
+     */
     protected $db;
-    protected $dbName;
 
     /**
      * Initialize the driver.
@@ -58,9 +62,6 @@ class NewGenLib extends AbstractBase
             throw new ILSException('Configuration needs to be set.');
         }
 
-        // Define Database Name
-        $this->dbName = $this->config['Catalog']['database'];
-
         try {
             $connectStr = 'pgsql:host=' . $this->config['Catalog']['hostname'] .
                 ' user=' . $this->config['Catalog']['user'] .