diff --git a/src/wp-admin/includes/ajax-actions.php b/src/wp-admin/includes/ajax-actions.php
index cd43df1436..357fdc8d52 100644
--- a/src/wp-admin/includes/ajax-actions.php
+++ b/src/wp-admin/includes/ajax-actions.php
@@ -5158,26 +5158,6 @@ function wp_ajax_health_check_dotorg_communication() {
 	wp_send_json_success( $site_health->get_test_dotorg_communication() );
 }
 
-/**
- * Ajax handler for site health checks on debug mode.
- *
- * @since 5.2.0
- */
-function wp_ajax_health_check_is_in_debug_mode() {
-	wp_verify_nonce( 'health-check-site-status' );
-
-	if ( ! current_user_can( 'view_site_health_checks' ) ) {
-		wp_send_json_error();
-	}
-
-	if ( ! class_exists( 'WP_Site_Health' ) ) {
-		require_once ABSPATH . 'wp-admin/includes/class-wp-site-health.php';
-	}
-
-	$site_health = WP_Site_Health::get_instance();
-	wp_send_json_success( $site_health->get_test_is_in_debug_mode() );
-}
-
 /**
  * Ajax handler for site health checks on background updates.
  *