Export exception fixes - we dont yet have a ->cleanup method, so don't call it

I left the $exporter object as the first argument though in case we add
one later.
Signed-off-by: Penny Leach <penny@mjollnir.org>

htdocs/lib/errors.php

@@ -940,7 +940,6 @@ class ExportException extends SystemException {
 
     public function __construct($exporter, $message=null, $code=0) {
         parent::__construct($message, $code);
-        $exporter->cleanup();
     }
 }