diff -u b/core/lib/Drupal/Core/Validation/DrupalTranslator.php b/core/lib/Drupal/Core/Validation/DrupalTranslator.php
--- b/core/lib/Drupal/Core/Validation/DrupalTranslator.php
+++ b/core/lib/Drupal/Core/Validation/DrupalTranslator.php
@@ -35,32 +35,2 @@
    * {@inheritdoc}
-   *
-   * @deprecated in drupal:9.4.0 and is removed from drupal:10.0.0. Use
-   *   \Drupal\Core\Validation\DrupalTranslator::trans() instead.
-   *
-   * @see https://www.drupal.org/node/3255250
-   */
-  public function transChoice($id, $number, array $parameters = [], $domain = NULL, $locale = NULL) {
-    @trigger_error(__NAMESPACE__ . '\DrupalTranslator::transChoice() is deprecated in drupal:9.4.0 and is removed from drupal:10.0.0. Use DrupalTranslator::trans() instead. See https://www.drupal.org/node/3255250', E_USER_DEPRECATED);
-    // Violation messages can separated singular and plural versions by "|".
-    $ids = explode('|', $id);
-
-    if (!isset($ids[1])) {
-      throw new \InvalidArgumentException(sprintf('The message "%s" cannot be pluralized, because it is missing a plural (e.g. "There is one apple|There are @count apples").', $id));
-    }
-
-    // Normally, calls to formatPlural() need to use literal strings, like
-    // formatPlural($count, '1 item', '@count items')
-    // so that the Drupal project POTX string extractor will correctly
-    // extract the strings for translation and save them in a format that
-    // formatPlural() can work with. However, this is a special case, because
-    // Drupal is supporting a constraint message format from Symfony. So
-    // although $id looks like a variable here, it is actually coming from a
-    // static string in a constraint class that the POTX extractor knows about
-    // and has processed to work with formatPlural(), so this specific call to
-    // formatPlural() will work correctly.
-    return \Drupal::translation()->formatPlural($number, $ids[0], $ids[1], $this->processParameters($parameters), $this->getOptions($domain, $locale));
-  }
-
-  /**
-   * {@inheritdoc}
    */
only in patch2:
unchanged:
--- a/core/tests/Drupal/KernelTests/Core/Validation/DrupalTranslatorTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Validation/DrupalTranslatorTest.php
@@ -5,7 +5,6 @@
 use Drupal\Core\DependencyInjection\ContainerBuilder;
 use Drupal\Core\StringTranslation\PluralTranslatableMarkup;
 use Drupal\Core\StringTranslation\TranslationManager;
-use Drupal\Core\Validation\DrupalTranslator;
 use Drupal\Tests\UnitTestCase;
 
 /**
@@ -43,19 +42,4 @@ public function setUp(): void {
     \Drupal::setContainer($container);
   }
 
-  /**
-   * Test transChoice deprecation message.
-   *
-   * @covers ::transChoice
-   * @group legacy
-   */
-  public function testDeprecation() {
-    $this->expectDeprecation('Drupal\Core\Validation\DrupalTranslator::transChoice() is deprecated in drupal:9.4.0 and is removed from drupal:10.0.0. Use DrupalTranslator::trans() instead. See https://www.drupal.org/node/3255250');
-    $translator = new DrupalTranslator();
-    $this->assertInstanceOf(
-      PluralTranslatableMarkup::class,
-      $translator->transChoice('There is one apple | There are @count apples', 1)
-    );
-  }
-
 }