bug #6840 fix #6837 - redirection to show page after delete action (eminjk)

This PR was merged into the 4.x branch.

Discussion
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fix #6837 - redirection to show page after delete action

fix #6837, similar to #6832

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Commits
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9efdbe4 fix AbstractCrudController.php

Author: javiereguiluz

src/Controller/AbstractCrudController.php

@@ -387,10 +387,6 @@ public function delete(AdminContext $context)
             return $event->getResponse();
         }
 
-        if (null !== $referrer = $context->getRequest()->headers->get('referer')) {
-            return $this->redirect($referrer);
-        }
-
         return $this->redirect($this->container->get(AdminUrlGenerator::class)->setController($context->getCrud()->getControllerFqcn())->setAction(Action::INDEX)->unset(EA::ENTITY_ID)->generateUrl());
     }