Remove core that was left out when trying to make exposed filters work.

src/Plugin/EntityBrowser/Widget/View.php

@@ -57,9 +57,7 @@ public function getForm(array &$original_form, FormStateInterface $form_state, a
       }
     }
 
-    \Drupal::requestStack()->push(new Request());
     $form['view'] = $storage['widget_view']->executeDisplay($this->configuration['view_display']);
-    \Drupal::requestStack()->pop();
 
     if (empty($storage['widget_view']->field['entity_browser_select'])) {
       return [
@@ -78,11 +76,8 @@ public function getForm(array &$original_form, FormStateInterface $form_state, a
       }
     }
 
-    $form['view']['exposed_form'] = $form['view']['view']['#view']->exposed_widgets;
-    $form['view']['exposed_form']['#type'] = 'container';
-    unset($form['view']['exposed_form']['#theme']);
     $form['view']['view'] = [
-      '#markup' => drupal_render($form['view']['view']),
+      '#markup' => \Drupal::service('renderer')->render($form['view']['view']),
     ];
 
     return $form;