[DoctrineBundle] removed unused parameters

src/Symfony/Bundle/DoctrineBundle/Resources/config/orm.xml

@@ -6,9 +6,6 @@
 
     <parameters>
         <parameter key="doctrine.orm.default_entity_manager">default</parameter>
-        <parameter key="doctrine.orm.metadata_cache_driver">array</parameter>
-        <parameter key="doctrine.orm.query_cache_driver">array</parameter>
-        <parameter key="doctrine.orm.result_cache_driver">array</parameter>
         <parameter key="doctrine.orm.configuration_class">Doctrine\ORM\Configuration</parameter>
         <parameter key="doctrine.orm.entity_manager_class">Doctrine\ORM\EntityManager</parameter>
         <parameter key="doctrine.orm.auto_generate_proxy_classes">false</parameter>