diff --git a/core/lib/Drupal/Core/Extension/Dependency.php b/core/lib/Drupal/Core/Extension/Dependency.php
index a8b59d7c80..c68b9e938c 100644
--- a/core/lib/Drupal/Core/Extension/Dependency.php
+++ b/core/lib/Drupal/Core/Extension/Dependency.php
@@ -7,14 +7,6 @@
 
 /**
  * A value object representing dependency information.
- *
- * This class implements \ArrayAccess to provide a backwards compatibility layer
- * for Drupal 8.x. This will be removed before Drupal 9.x.
- *
- * @see https://www.drupal.org/node/2756875
- * @deprecated \Drupal\Core\Extension\Dependency is deprecated in drupal:8.8.0.
- *   Use \Drupal\Core\Extension\Dependency\Composer instead. See
- *   https://www.drupal.org/node/3047893
  */
 class Dependency implements \ArrayAccess, DependencyInterface {
 
@@ -60,7 +52,6 @@ public function __construct($name, $project, $constraint) {
     $this->name = $name;
     $this->project = $project;
     $this->constraintString = $constraint;
-    @trigger_error('\Drupal\Core\Extension\Dependency is deprecated in drupal:8.8.0. Use \Drupal\Core\Extension\Dependency\Composer instead. See https://www.drupal.org/node/3047893', E_USER_DEPRECATED);
   }
 
   /**
diff --git a/core/tests/Drupal/Tests/Core/Extension/ExtensionDiscoveryDeprecationTest.php b/core/tests/Drupal/Tests/Core/Extension/ExtensionDiscoveryDeprecationTest.php
deleted file mode 100644
index d138bbccc2..0000000000
--- a/core/tests/Drupal/Tests/Core/Extension/ExtensionDiscoveryDeprecationTest.php
+++ /dev/null
@@ -1,51 +0,0 @@
-<?php
-
-namespace Drupal\Tests\Core\Extension;
-
-use Drupal\Core\Extension\ExtensionDiscovery;
-use Drupal\Core\Serialization\Yaml;
-use Drupal\Tests\UnitTestCase;
-use org\bovigo\vfs\vfsStream;
-
-/**
- * Defines a class for testing .info.yml files trigger deprecation warnings.
- *
- * @group Extension
- * @group legacy
- */
-class ExtensionDiscoveryDeprecationTest extends UnitTestCase {
-
-  /**
-   * @expectedDeprecation Using an info.yml file for defining modules, themes, theme engines and profiles is deprecated in drupal:8.8.0. It will be removed from drupal:9.0. Extension system contains an .info.yml file - use the upgrade command to convert the info file to composer.json. See https://www.drupal.org/node/3047893
-   */
-  public function testInfoFileTriggersDeprecation() {
-    $vfs = vfsStream::setup('root', NULL, [
-      'core' => [
-        'modules' => [
-          'system' => [
-            'system.info.yml' => Yaml::encode([
-              'type' => 'module',
-              'name' => "System module",
-              'core' => '8.x',
-            ]),
-          ],
-        ],
-        'profiles' => [
-          'myprofile' => Yaml::encode([
-            'type' => 'profile',
-            'name' => "My profile",
-            'core' => '8.x',
-          ]),
-        ],
-      ],
-    ]);
-    $root = $vfs->url();
-
-    $this->assertFileExists($root . '/core/modules/system/system.info.yml');
-    // Create an ExtensionDiscovery with $root.
-    $extension_discovery = new ExtensionDiscovery($root, FALSE, NULL, 'sites/default');
-    $extension_discovery->setProfileDirectories(['myprofile' => 'profiles/myprofile']);
-    $extension_discovery->scan('module', FALSE);
-  }
-
-}