reverted:
--- b/core/lib/Drupal/Core/Block/BlockOperationsProviderInterface.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-namespace Drupal\Core\Block;
-
-/**
- * Defines an interface for providing operations links.
- *
- * @see \Drupal\block\Entity\Block::getOperationLinks()
- *
- * @ingroup block_api
- */
-interface BlockOperationsProviderInterface {
-
-  /**
-   * Returns a list of operation links available for this block.
-   *
-   * @return array[]
-   *   An array of operation links. Keys in this array will overwrite keys of
-   *   operations defined in
-   *   \Drupal\block\BlockListBuilder::getDefaultOperations().
-   *   Each operation link is itself an array with the following keys:
-   *     - title: The title the link should display.
-   *     - url: The \Drupal\Core\Url object for the link.
-   *     - weight: The link weight.
-   */
-  public function getOperationLinks(): array;
-
-}
diff -u b/core/modules/block/src/Entity/Block.php b/core/modules/block/src/Entity/Block.php
--- b/core/modules/block/src/Entity/Block.php
+++ b/core/modules/block/src/Entity/Block.php
@@ -2,7 +2,6 @@
 
 namespace Drupal\block\Entity;
 
-use Drupal\Core\Block\BlockOperationsProviderInterface;
 use Drupal\Core\Cache\Cache;
 use Drupal\Core\Condition\ConditionPluginCollection;
 use Drupal\Core\Config\Entity\ConfigEntityBase;
@@ -360,12 +359,10 @@
    */
   public function getOperationLinks(): array {
     $plugin = $this->getPlugin();
-    $links = [];
-    if ($plugin instanceof BlockOperationsProviderInterface) {
-      $links = $plugin->getOperationLinks();
+    if (method_exists($plugin, 'getOperationLinks')) {
+      return $plugin->getOperationLinks();
     }
-
-    return $links;
+    return [];
   }
 
 }
diff -u b/core/modules/block_content/src/Plugin/Block/BlockContentBlock.php b/core/modules/block_content/src/Plugin/Block/BlockContentBlock.php
--- b/core/modules/block_content/src/Plugin/Block/BlockContentBlock.php
+++ b/core/modules/block_content/src/Plugin/Block/BlockContentBlock.php
@@ -6,7 +6,6 @@
 use Drupal\Core\Access\AccessResult;
 use Drupal\Core\Block\BlockBase;
 use Drupal\Core\Block\BlockManagerInterface;
-use Drupal\Core\Block\BlockOperationsProviderInterface;
 use Drupal\Core\Entity\EntityDisplayRepositoryInterface;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
 use Drupal\Core\Form\FormStateInterface;
@@ -25,7 +24,7 @@
  *  deriver = "Drupal\block_content\Plugin\Derivative\BlockContent"
  * )
  */
-class BlockContentBlock extends BlockBase implements ContainerFactoryPluginInterface, BlockOperationsProviderInterface {
+class BlockContentBlock extends BlockBase implements ContainerFactoryPluginInterface {
 
   /**
    * The Plugin Block Manager.
diff -u b/core/modules/system/src/Plugin/Block/SystemMenuBlock.php b/core/modules/system/src/Plugin/Block/SystemMenuBlock.php
--- b/core/modules/system/src/Plugin/Block/SystemMenuBlock.php
+++ b/core/modules/system/src/Plugin/Block/SystemMenuBlock.php
@@ -3,14 +3,12 @@
 namespace Drupal\system\Plugin\Block;
 
 use Drupal\Core\Block\BlockBase;
-use Drupal\Core\Block\BlockOperationsProviderInterface;
 use Drupal\Core\Cache\Cache;
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Menu\MenuActiveTrailInterface;
 use Drupal\Core\Menu\MenuLinkTreeInterface;
 use Drupal\Core\Menu\MenuTreeParameters;
-use Drupal\Core\Session\AccountInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\Url;
 use Drupal\system\Entity\Menu;
@@ -29,7 +27,7 @@
  *   },
  * )
  */
-class SystemMenuBlock extends BlockBase implements ContainerFactoryPluginInterface, BlockOperationsProviderInterface {
+class SystemMenuBlock extends BlockBase implements ContainerFactoryPluginInterface {
 
   /**
    * The menu link tree service.
@@ -54,11 +52,4 @@
 
   /**
-   * The current user.
-   *
-   * @var \Drupal\Core\Session\AccountInterface
-   */
-  protected AccountInterface $user;
-
-  /**
    * Constructs a new SystemMenuBlock.
    *
@@ -74,24 +65,17 @@
    *   The active menu trail service.
    * @param \Drupal\Core\Extension\ModuleHandlerInterface|null $module_handler
    *   The module handler used to check whether menu_ui is installed.
-   * @param \Drupal\Core\Session\AccountInterface|null $user
-   *   The current user.
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, MenuLinkTreeInterface $menu_tree, MenuActiveTrailInterface $menu_active_trail, ModuleHandlerInterface $module_handler = NULL, AccountInterface $user = NULL) {
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, MenuLinkTreeInterface $menu_tree, MenuActiveTrailInterface $menu_active_trail, ModuleHandlerInterface $module_handler = NULL) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
 
     if (is_null($module_handler)) {
       @trigger_error('The SystemMenuBlock constructor now accepts \Drupal\Core\Extension\ModuleHandlerInterface in drupal:10.1.0 and is required in drupal:11.0.0. See https://www.drupal.org/node/3333923.', E_USER_DEPRECATED);
     }
 
-    if (is_null($user)) {
-      @trigger_error('The SystemMenuBlock constructor now accepts \Drupal\Core\Session\AccountInterface in drupal:10.1.0 and is required in drupal:11.0.0. See https://www.drupal.org/node/3333923.', E_USER_DEPRECATED);
-    }
-
     $this->menuTree = $menu_tree;
     $this->menuActiveTrail = $menu_active_trail;
     $this->moduleHandler = $module_handler;
-    $this->user = $user;
   }
 
   /**
@@ -105,7 +89,6 @@
       $container->get('menu.link_tree'),
       $container->get('menu.active_trail'),
       $container->get('module_handler'),
-      $container->get('current_user'),
     );
   }
 
diff -u b/core/modules/views/src/Plugin/Block/ViewsBlockBase.php b/core/modules/views/src/Plugin/Block/ViewsBlockBase.php
--- b/core/modules/views/src/Plugin/Block/ViewsBlockBase.php
+++ b/core/modules/views/src/Plugin/Block/ViewsBlockBase.php
@@ -2,7 +2,6 @@
 
 namespace Drupal\views\Plugin\Block;
 
-use Drupal\Core\Block\BlockOperationsProviderInterface;
 use Drupal\Core\Url;
 use Drupal\Core\Access\AccessResult;
 use Drupal\Core\Block\BlockBase;
@@ -17,7 +16,7 @@
 /**
  * Base class for Views block plugins.
  */
-abstract class ViewsBlockBase extends BlockBase implements ContainerFactoryPluginInterface, BlockOperationsProviderInterface {
+abstract class ViewsBlockBase extends BlockBase implements ContainerFactoryPluginInterface {
 
   /**
    * The View executable object.