diff --git a/core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php b/core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php
index a44ff14fba0340a84e8ca18d2368275b8bb65d27..e3e8ce08f946326587afe0f399bb2fa5cee140ee 100644
--- a/core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php
+++ b/core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php
@@ -95,10 +95,10 @@ class LibraryDiscoveryParser {
    *   The libraries directory file finder.
    * @param \Drupal\Core\Extension\ExtensionPathResolver $extension_path_resolver
    *   The extension path resolver.
-   * @param \Drupal\Core\Theme\ComponentPluginManager|null $component_plugin_manager
+   * @param \Drupal\Core\Theme\ComponentPluginManager $component_plugin_manager
    *   The component plugin manager.
    */
-  public function __construct($root, ModuleHandlerInterface $module_handler, ThemeManagerInterface $theme_manager, StreamWrapperManagerInterface $stream_wrapper_manager, LibrariesDirectoryFileFinder $libraries_directory_file_finder, ExtensionPathResolver $extension_path_resolver, ?ComponentPluginManager $component_plugin_manager = NULL) {
+  public function __construct($root, ModuleHandlerInterface $module_handler, ThemeManagerInterface $theme_manager, StreamWrapperManagerInterface $stream_wrapper_manager, LibrariesDirectoryFileFinder $libraries_directory_file_finder, ExtensionPathResolver $extension_path_resolver, ComponentPluginManager $component_plugin_manager) {
     $this->root = $root;
     $this->moduleHandler = $module_handler;
     $this->themeManager = $theme_manager;
@@ -106,10 +106,6 @@ public function __construct($root, ModuleHandlerInterface $module_handler, Theme
     $this->librariesDirectoryFileFinder = $libraries_directory_file_finder;
     $this->extensionPathResolver = $extension_path_resolver;
     $this->fileCache = FileCacheFactory::get('library_parser');
-    if (!isset($component_plugin_manager)) {
-      @trigger_error('Calling ' . __METHOD__ . '() without the $component_plugin_manager argument is deprecated in drupal:10.3.0 and will be required in drupal:11.0.0. See https://www.drupal.org/node/3410260', E_USER_DEPRECATED);
-      $component_plugin_manager = \Drupal::service('plugin.manager.sdc');
-    }
     $this->componentPluginManager = $component_plugin_manager;
   }
 
diff --git a/core/lib/Drupal/Core/Template/ComponentsTwigExtension.php b/core/lib/Drupal/Core/Template/ComponentsTwigExtension.php
index b4f5365021b710259e1b66f32c2e67d6249ffdb2..49e214c6b88617779f385fbc601c44a0357065d1 100644
--- a/core/lib/Drupal/Core/Template/ComponentsTwigExtension.php
+++ b/core/lib/Drupal/Core/Template/ComponentsTwigExtension.php
@@ -44,12 +44,6 @@ public function getFunctions(): array {
     return [
       new TwigFunction('add_component_context', [$this, 'addAdditionalContext'], ['needs_context' => TRUE]),
       new TwigFunction('validate_component_props', [$this, 'validateProps'], ['needs_context' => TRUE]),
-      // @todo remove in drupal:11.0.0.
-      // @see https://www.drupal.org/project/drupal/issues/3409456.
-      // Start of BC layer.
-      new TwigFunction('sdc_additional_context', [$this, 'addAdditionalContext'], ['needs_context' => TRUE, 'deprecated' => '10.3.0', 'alternative' => 'add_component_context']),
-      new TwigFunction('sdc_validate_props', [$this, 'validateProps'], ['needs_context' => TRUE, 'deprecated' => '10.3.0', 'alternative' => 'validate_component_props']),
-      // End of BC layer.
     ];
   }
 
diff --git a/core/modules/sdc/README.txt b/core/modules/sdc/README.txt
deleted file mode 100644
index fdb7db73186dd5ec1a292d5cf5032ad6ba046301..0000000000000000000000000000000000000000
--- a/core/modules/sdc/README.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-The API of Single Directory Components includes:
-
-  - The component plugin manager (the service with name plugin.manager.sdc).
-    This service will be needed by modules that need to find and instantiate
-    components.
-  - The exceptions. Code using Single Directory Components can rely, and extend,
-    the exceptions provided by the experimental module.
-  - The folder structure of a component and the naming conventions of the files
-    in it.
-  - The structure of the component metadata (the my-component.component.yml).
-    Note that the metadata of the component is described, and optionally
-    validated, by the schema in metadata.schema.json (this file is for internal validation and not part of the API).
-  - The render element and its class \Drupal\Core\Render\Element\ComponentElement.
-  - The naming convention for the ID when using Twig's include, embed, and
-    extends. This naming convention is [module/theme]:[component machine name].
-    See the example below.
-
-{% embed 'my-theme:my-component' with { prop1: content.field_for_prop1 } %}
-  {% block slot1 %}
-    {{ content|without('field_for_prop1') }}
-  {% endblock %}
-{% endembed %}
-
-This way  of specifying the component for Twig's include, embed, and
-extends('my-theme:my-component' in the example) will not change, as it is
-considered an API.
diff --git a/core/modules/sdc/sdc.info.yml b/core/modules/sdc/sdc.info.yml
index 98ef12cc4312e6bc47336fe8609c28fb94085bb4..6a41593d15cb1cff66cd996f762ee63f4ec8874e 100644
--- a/core/modules/sdc/sdc.info.yml
+++ b/core/modules/sdc/sdc.info.yml
@@ -3,7 +3,8 @@ type: module
 description: 'Allows discovery and rendering of self-contained UI components.'
 version: VERSION
 package: Core (Experimental)
-lifecycle: deprecated
-lifecycle_link: 'https://www.drupal.org/docs/core-modules-and-themes/deprecated-and-obsolete#s-understanding-deprecated-extensions'
+lifecycle: obsolete
+lifecycle_link: https://www.drupal.org/node/3223395#s-sdc
 dependencies:
   - drupal:serialization
+hidden: true
diff --git a/core/modules/sdc/sdc.module b/core/modules/sdc/sdc.module
deleted file mode 100644
index 89da82a3448aaa5abbdd38abb3ae608efb1a7590..0000000000000000000000000000000000000000
--- a/core/modules/sdc/sdc.module
+++ /dev/null
@@ -1,64 +0,0 @@
-<?php
-
-/**
- * @file
- * Module implementation file.
- */
-
-use Drupal\Core\Theme\ComponentPluginManager;
-use Drupal\Core\Plugin\Component;
-
-@class_alias('Drupal\Core\Render\Element', 'Drupal\sdc\Utilities');
-@class_alias('Drupal\Core\Render\Element\ComponentElement', 'Drupal\sdc\Element\ComponentElement');
-@class_alias('Drupal\Core\Render\Component\Exception\ComponentNotFoundException', 'Drupal\sdc\Exception\ComponentNotFoundException');
-@class_alias('Drupal\Core\Render\Component\Exception\IncompatibleComponentSchema', 'Drupal\sdc\Exception\IncompatibleComponentSchema');
-@class_alias('Drupal\Core\Render\Component\Exception\InvalidComponentDataException', 'Drupal\sdc\Exception\InvalidComponentDataException');
-@class_alias('Drupal\Core\Render\Component\Exception\InvalidComponentException', 'Drupal\sdc\Exception\InvalidComponentException');
-@class_alias('Drupal\Core\Theme\Component\ComponentMetadata', 'Drupal\sdc\Component\ComponentMetadata');
-@class_alias('Drupal\Core\Theme\Component\ComponentValidator', 'Drupal\sdc\Component\ComponentValidator');
-@class_alias('Drupal\Core\Theme\Component\SchemaCompatibilityChecker', 'Drupal\sdc\Component\SchemaCompatibilityChecker');
-@class_alias('Drupal\Core\Plugin\Component', 'Drupal\sdc\Plugin\Component');
-@class_alias('Drupal\Core\Plugin\Discovery\DirectoryWithMetadataDiscovery', 'Drupal\sdc\Plugin\Discovery\DirectoryWithMetadataDiscovery');
-@class_alias('Drupal\Core\Plugin\Discovery\DirectoryWithMetadataPluginDiscovery', 'Drupal\sdc\Plugin\Discovery\DirectoryWithMetadataPluginDiscovery');
-@class_alias('Drupal\Core\Plugin\Discovery\RegexRecursiveFilterIterator', 'Drupal\sdc\Plugin\Discovery\RegexRecursiveFilterIterator');
-@class_alias('Drupal\Core\Template\ComponentNodeVisitor', 'Drupal\sdc\Twig\ComponentNodeVisitor');
-@class_alias('Drupal\Core\Template\Loader\ComponentLoader', 'Drupal\sdc\Twig\TwigComponentLoader');
-@class_alias('Drupal\Core\Theme\ComponentNegotiator', 'Drupal\sdc\ComponentNegotiator');
-@class_alias('Drupal\Core\Theme\ComponentPluginManager', 'Drupal\sdc\ComponentPluginManager');
-@class_alias('Drupal\Core\Theme\ExtensionType', 'Drupal\sdc\ExtensionType');
-
-/**
- * Implements hook_library_info_build().
- */
-function sdc_library_info_build() {
-  $deprecation_message = 'The %library_id% asset library is deprecated in Drupal 10.3.0 and will be removed in Drupal 11.0.0. Use the core/components.[component-id] library instead. See https://www.drupal.org/node/3410260';
-  // Iterate over all the components to get the CSS and JS files.
-  $plugin_manager = \Drupal::service('plugin.manager.sdc');
-  assert($plugin_manager instanceof ComponentPluginManager);
-  $components = $plugin_manager->getAllComponents();
-  // Generate backwards compatible deprecated libraries that depend on the new
-  // library name scheme.
-  $libraries = array_reduce(
-    $components,
-    static function (array $libraries, Component $component) use ($deprecation_message) {
-      // The library name is something like core/components.my-theme--my-comp.
-      $library_name = $component->getLibraryName();
-      // The library ID is something like my-theme--my-comp.
-      $library_id = str_replace('core/components.', '', $library_name);
-      // Adding these libraries will result in the old 'sdc/my-theme--my-comp'.
-      return array_merge($libraries, [
-        $library_id => [
-          'dependencies' => [$library_name],
-          'deprecated' => $deprecation_message,
-        ],
-      ]);
-    },
-    []
-  );
-  // Alias the library sdc/all to core/components.all.
-  $libraries['all'] = [
-    'dependencies' => ['core/components.all'],
-    'deprecated' => 'The %library_id% asset library is deprecated in Drupal 10.3.0 and will be removed in Drupal 11.0.0. Use the core/components.all library instead. See https://www.drupal.org/node/3410260',
-  ];
-  return $libraries;
-}
diff --git a/core/modules/sdc/sdc.services.yml b/core/modules/sdc/sdc.services.yml
deleted file mode 100644
index 379762e1d7938f30847578de1566d0f910adbf76..0000000000000000000000000000000000000000
--- a/core/modules/sdc/sdc.services.yml
+++ /dev/null
@@ -1,44 +0,0 @@
-services:
-  _defaults:
-    public: false
-
-  # This service is deprecated, use the one defined in core instead.
-  Drupal\sdc\Twig\TwigComponentLoader:
-    alias: 'Drupal\Core\Template\Loader\ComponentLoader'
-    deprecated:
-      package: 'drupal/core'
-      version: '10.3.0'
-      message: The "%alias_id%" service is deprecated since drupal/core 10.3.0 and will be removed in 11.0.
-
-  # This service is deprecated, use the one defined in core instead.
-  Drupal\sdc\ComponentNegotiator:
-    alias: 'Drupal\Core\Theme\ComponentNegotiator'
-    deprecated:
-      package: 'drupal/core'
-      version: '10.3.0'
-      message: The "%alias_id%" service is deprecated since drupal/core 10.3.0 and will be removed in 11.0.
-
-  # This service defines the deprecated twig functions related to SDC.
-  # Use the ones defined in core instead.
-  Drupal\sdc\Twig\TwigExtension:
-    alias: 'Drupal\Core\Template\ComponentsTwigExtension'
-    deprecated:
-      package: 'drupal/core'
-      version: '10.3.0'
-      message: The "%alias_id%" service is deprecated since drupal/core 10.3.0 and will be removed in 11.0.
-
-  # This service is deprecated, use the one defined in core instead.
-  Drupal\sdc\Component\SchemaCompatibilityChecker:
-    alias: 'Drupal\Core\Theme\Component\SchemaCompatibilityChecker'
-    deprecated:
-      package: 'drupal/core'
-      version: '10.3.0'
-      message: The "%alias_id%" service is deprecated since drupal/core 10.3.0 and will be removed in 11.0.
-
-  # This service is deprecated, use the one defined in core instead.
-  Drupal\sdc\Component\ComponentValidator:
-    alias: 'Drupal\Core\Theme\Component\ComponentValidator'
-    deprecated:
-      package: 'drupal/core'
-      version: '10.3.0'
-      message: The "%alias_id%" service is deprecated since drupal/core 10.3.0 and will be removed in 11.0.
diff --git a/core/modules/sdc/tests/src/Functional/LibrariesBCLayerTest.php b/core/modules/sdc/tests/src/Functional/LibrariesBCLayerTest.php
deleted file mode 100644
index e3417be3c89c71b429a0100c9e9c674bb2937058..0000000000000000000000000000000000000000
--- a/core/modules/sdc/tests/src/Functional/LibrariesBCLayerTest.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Drupal\Tests\sdc\Functional;
-
-use Drupal\Tests\BrowserTestBase;
-
-/**
- * Tests the correct rendering of components.
- *
- * @group sdc
- * @group legacy
- *
- * @internal
-*/
-final class LibrariesBCLayerTest extends BrowserTestBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  protected static $modules = ['system', 'sdc', 'sdc_test'];
-
-  /**
-   * {@inheritdoc}
-   */
-  protected $defaultTheme = 'sdc_theme_test';
-
-  /**
-   * Tests libraryOverrides.
-   */
-  public function testLibraryBCLayer(): void {
-    $this->expectDeprecation('The module \'sdc\' is deprecated. See https://www.drupal.org/docs/core-modules-and-themes/deprecated-and-obsolete#s-understanding-deprecated-extensions');
-    $this->expectDeprecation('The sdc/sdc_theme_test--my-card asset library is deprecated in Drupal 10.3.0 and will be removed in Drupal 11.0.0. Use the core/components.[component-id] library instead. See https://www.drupal.org/node/3410260');
-    $build = [
-      '#type' => 'inline_template',
-      '#template' => "<h2>Foo</h2>{{ attach_library('sdc/sdc_theme_test--my-card') }}",
-    ];
-    \Drupal::state()->set('sdc_test_component', $build);
-    $output = $this->drupalGet('sdc-test-component');
-    // Ensure the CSS from the component is properly added to the page.
-    $this->assertStringContainsString('my-card.css', $output);
-  }
-
-}
diff --git a/core/modules/system/system.post_update.php b/core/modules/system/system.post_update.php
index 13b15470f40272b5b58aa07002b4e0719e8b9e75..861e4ccd34a1fdd66f3a664eff53d72b9f7eb0c2 100644
--- a/core/modules/system/system.post_update.php
+++ b/core/modules/system/system.post_update.php
@@ -223,3 +223,12 @@ function system_post_update_set_cron_logging_setting_to_boolean(): void {
     $config->set('logging', (bool) $logging)->save();
   }
 }
+
+/**
+ * Uninstall the sdc module if installed.
+ */
+function system_post_update_sdc_uninstall() {
+  if (\Drupal::moduleHandler()->moduleExists('sdc')) {
+    \Drupal::service('module_installer')->uninstall(['sdc'], FALSE);
+  }
+}