diff --git a/packages/block-library/src/navigation/index.php b/packages/block-library/src/navigation/index.php
index 361db142d75028..971a5f500e7741 100644
--- a/packages/block-library/src/navigation/index.php
+++ b/packages/block-library/src/navigation/index.php
@@ -775,16 +775,6 @@ function render_block_core_navigation( $attributes, $content, $block ) {
 	$toggle_aria_label_open      = $should_display_icon_label ? 'aria-label="' . __( 'Open menu' ) . '"' : ''; // Open button label.
 	$toggle_aria_label_close     = $should_display_icon_label ? 'aria-label="' . __( 'Close menu' ) . '"' : ''; // Close button label.
 
-	/**
-	 * To do:
-	 * The overlay always shows if $attributes['overlayMenu'] === 'mobile'.
-	 * Some CSS is not loading, probably because do_blocks is used after wp_head?
-	 */
-	$overlay = isset( $attributes['overlayTemplatePart'] ) ? get_block_template( $attributes['overlayTemplatePart'] , 'wp_template_part' ) : '';
-	if ( ! empty( $overlay ) ) {
-		$inner_blocks_html = do_blocks( $overlay->content );
-	}
-
 	$responsive_container_markup = sprintf(
 		'<button aria-haspopup="true" %3$s class="%6$s" data-micromodal-trigger="%1$s">%9$s</button>
 			<div class="%5$s" style="%7$s" id="%1$s">