diff --git a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
index 1331f34..5785a7d 100644
--- a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
+++ b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
@@ -277,76 +277,6 @@ protected function assertNoRaw($raw) {
   }
 
   /**
-   * Passes if the text is found only once on the text version of the page.
-   *
-   * The text version is the equivalent of what a user would see when viewing
-   * through a web browser. In other words the HTML has been filtered out of
-   * the contents.
-   *
-   * @param string|\Drupal\Component\Render\MarkupInterface $text
-   *   Plain text to look for.
-   * @param string $message
-   *   (optional) A message to display with the assertion. Do not translate
-   *   messages with t(). If left blank, a default message will be displayed.
-   *
-   * @deprecated Scheduled for removal in Drupal 9.0.0.
-   *   Use $this->getSession()->getPage()->getText() and substr_count() instead.
-   */
-  protected function assertUniqueText($text, $message = NULL) {
-    // Cast MarkupInterface objects to string.
-    $text = (string) $text;
-
-    $message = $message ?: "'$text' found only once on the page";
-    $page_text = $this->getSession()->getPage()->getText();
-    $occurrences = substr_count($page_text, $text);
-    $this->assertSame(1, $occurrences, $message);
-  }
-
-  /**
-   * Passes if the text is found more than once on the text version of the page.
-   *
-   * The text version is the equivalent of what a user would see when viewing
-   * through a web browser. In other words the HTML has been filtered out of
-   * the contents.
-   *
-   * @param string|\Drupal\Component\Render\MarkupInterface $text
-   *   Plain text to look for.
-   * @param string $message
-   *   (optional) A message to display with the assertion. Do not translate
-   *   messages with t(). If left blank, a default message will be displayed.
-   *
-   * @deprecated Scheduled for removal in Drupal 9.0.0.
-   *   Use $this->getSession()->getPage()->getText() and substr_count() instead.
-   */
-  protected function assertNoUniqueText($text, $message = '') {
-    // Cast MarkupInterface objects to string.
-    $text = (string) $text;
-
-    $message = $message ?: "'$text' found more than once on the page";
-    $page_text = $this->getSession()->getPage()->getText();
-    $occurrences = substr_count($page_text, $text);
-    $this->assertGreaterThan(1, $occurrences, $message);
-  }
-
-  /**
-   * Triggers a pass if the Perl regex pattern is found in the raw content.
-   *
-   * @param string $pattern
-   *   Perl regex to look for including the regex delimiters.
-   * @param string $message
-   *   (optional) A message to display with the assertion. Do not translate
-   *   messages: use \Drupal\Component\Utility\SafeMarkup::format() to embed
-   *   variables in the message text, not t(). If left blank, a default message
-   *   will be displayed.
-   *
-   * @deprecated Scheduled for removal in Drupal 9.0.0.
-   *   Use $this->assertSession()->responseMatches() instead.
-   */
-  protected function assertPattern($pattern, $message = '') {
-    $this->assertSession()->responseMatches($pattern);
-  }
-
-  /**
    * Pass if the page title is the given string.
    *
    * @param string $expected_title