FIX #23967 TIME 0 remove var_dump

src/app/document/controllers/WatermarkController.php

@@ -87,7 +87,6 @@ class WatermarkController
             $fileContent = $pdf->Output('', 'S');
         } catch (\Exception $e) {
             $fileContent = null;
-            var_dump($e);
         }
 
         return $fileContent;