diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index ee0302249805..3a2a964fb8ba 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -126,9 +126,6 @@ function drupal_theme_rebuild() {
 /**
  * Allows themes and/or theme engines to discover overridden theme functions.
  *
- * @internal only exists to support discovery of deprecated theme functions,
- *   will be removed in Drupal 10.0.0.
- *
  * @param array $cache
  *   The existing cache of theme hooks to test against.
  * @param array $prefixes