remove isset test on variable which always exists

src/Bundle/ChillPersonBundle/Controller/ReassignAccompanyingPeriodController.php

@@ -140,7 +140,7 @@ class ReassignAccompanyingPeriodController extends AbstractController
                 'paginator' => $paginator,
                 'periods' => $periods,
                 'form' => $form->createView(),
-                'assignForm' => isset($assignForm) ? $assignForm->createView() : null,
+                'assignForm' => $assignForm->createView(),
             ])
         );
     }