Cleanup: Remove breadcrumbs configuration

The breadcrumbs were removed from subpages before #269 was merged, but this configuration code was left in place. It's not used, and can be removed

source/wp-content/themes/wporg-main-2022/functions.php

@@ -22,7 +22,6 @@
 add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\enqueue_assets' );
 add_action( 'init', __NAMESPACE__ . '\register_shortcodes' );
 add_filter( 'wp_img_tag_add_loading_attr', __NAMESPACE__ . '\override_lazy_loading', 10, 2 );
-add_filter( 'wporg_block_site_breadcrumbs', __NAMESPACE__ . '\update_site_breadcrumbs' );
 add_filter( 'render_block_core/site-title', __NAMESPACE__ . '\use_parent_page_title', 10, 3 );
 add_filter( 'render_block_data', __NAMESPACE__ . '\update_header_template_part_class' );
 add_filter( 'wporg_block_navigation_menus', __NAMESPACE__ . '\add_site_navigation_menus' );
@@ -134,32 +133,6 @@ function override_lazy_loading( $value, $image ) {
 	return $value;
 }
 
-/**
- * Use the page heirarchy to display breadcrumbs.
- */
-function update_site_breadcrumbs( $breadcrumbs ) {
-	$parent = get_post_parent();
-	if ( ! $parent ) {
-		return $breadcrumbs;
-	}
-
-	$breadcrumbs = array();
-	$breadcrumbs[] = array(
-		'url' => false,
-		'title' => get_the_title(),
-	);
-
-	while ( $parent ) {
-		$breadcrumbs[] = array(
-			'url' => get_permalink( $parent->ID ),
-			'title' => $parent->post_title,
-		);
-		$parent = get_post_parent( $parent );
-	}
-
-	return array_reverse( $breadcrumbs );
-}
-
 /**
  * Provide a list of local navigation menus.
  */