diff --git a/core/modules/block/src/BlockListBuilder.php b/core/modules/block/src/BlockListBuilder.php
index 18744e9..c8339e3 100644
--- a/core/modules/block/src/BlockListBuilder.php
+++ b/core/modules/block/src/BlockListBuilder.php
@@ -321,79 +321,6 @@ protected function buildBlocksForm() {
   }
 
   /**
-   * Builds the "Place Blocks" portion of the form.
-   *
-   * @return array
-   */
-  protected function buildPlaceBlocksForm() {
-    $form['title'] = array(
-      '#type' => 'container',
-      '#markup' => '<h3>' . $this->t('Place blocks') . '</h3>',
-      '#attributes' => array(
-        'class' => array(
-          'entity-meta__header',
-        ),
-      ),
-    );
-
-    $form['filter'] = array(
-      '#type' => 'search',
-      '#title' => $this->t('Filter'),
-      '#title_display' => 'invisible',
-      '#size' => 30,
-      '#placeholder' => $this->t('Filter by block name'),
-      '#attributes' => array(
-        'class' => array('block-filter-text'),
-        'data-element' => '.entity-meta',
-        'title' => $this->t('Enter a part of the block name to filter by.'),
-      ),
-    );
-
-    $form['list']['#type'] = 'container';
-    $form['list']['#attributes']['class'][] = 'entity-meta';
-
-    // Only add blocks which work without any available context.
-    $contexts = $this->contextRepository->getAvailableContexts();
-    $definitions = $this->blockManager->getDefinitionsForContexts($contexts);
-    $sorted_definitions = $this->blockManager->getSortedDefinitions($definitions);
-    foreach ($sorted_definitions as $plugin_id => $plugin_definition) {
-      $category = SafeMarkup::checkPlain($plugin_definition['category']);
-      $category_key = 'category-' . $category;
-      if (!isset($form['list'][$category_key])) {
-        $form['list'][$category_key] = array(
-          '#type' => 'details',
-          '#title' => $category,
-          '#open' => TRUE,
-          'content' => array(
-            '#theme' => 'links',
-            '#links' => array(),
-            '#attributes' => array(
-              'class' => array(
-                'block-list',
-              ),
-            ),
-          ),
-        );
-      }
-      $form['list'][$category_key]['content']['#links'][$plugin_id] = array(
-        'title' => $plugin_definition['admin_label'],
-        'url' => Url::fromRoute('block.admin_add', [
-          'plugin_id' => $plugin_id,
-          'theme' => $this->theme
-        ]),
-        'attributes' => array(
-          'class' => array('use-ajax', 'block-filter-text-source'),
-          'data-dialog-type' => 'modal',
-          'data-dialog-options' => Json::encode(array(
-            'width' => 700,
-          )),
-        ),
-      );
-    }
-    return $form;
-  }
-
-  /**
    * Gets the name of the theme used for this block listing.
    *
    * @return string