diff --git a/mu-plugins/blocks/global-header-footer/blocks.php b/mu-plugins/blocks/global-header-footer/blocks.php
index e884bbef..02a2faa9 100644
--- a/mu-plugins/blocks/global-header-footer/blocks.php
+++ b/mu-plugins/blocks/global-header-footer/blocks.php
@@ -9,7 +9,6 @@
 require_once __DIR__ . '/admin-bar.php';
 
 add_action( 'init', __NAMESPACE__ . '\register_block_types' );
-add_action( 'admin_bar_init', __NAMESPACE__ . '\remove_admin_bar_callback', 15 );
 add_action( 'rest_api_init', __NAMESPACE__ . '\register_routes' );
 add_filter( 'wp_enqueue_scripts', __NAMESPACE__ . '\register_block_assets', 200 ); // Always last.
 add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\enqueue_compat_wp4_styles', 5 ); // Before any theme CSS.
@@ -83,16 +82,6 @@ function register_block_assets() {
 	);
 }
 
-/**
- * Remove the default margin-top added when the admin bar is used.
- *
- * The core handling uses `!important`, which overrides the sticky header offset in `common.pcss`.
- */
-function remove_admin_bar_callback() {
-	remove_action( 'gp_head', '_admin_bar_bump_cb' );
-	remove_action( 'wp_head', '_admin_bar_bump_cb' );
-}
-
 /**
  * Register REST API routes, so non-WP applications can integrate it.
  */
diff --git a/mu-plugins/blocks/global-header-footer/postcss/_common.pcss b/mu-plugins/blocks/global-header-footer/postcss/_common.pcss
index c30ac861..701d8884 100644
--- a/mu-plugins/blocks/global-header-footer/postcss/_common.pcss
+++ b/mu-plugins/blocks/global-header-footer/postcss/_common.pcss
@@ -21,9 +21,6 @@
 html {
 	--wp--custom--alignment--scroll-bar-width: 8px;
 
-	/* Offset from the top of the page which is covered by "stuck" items (admin bar & header). */
-	--wp-global-header-offset: calc(var(--wp-global-header-height, 0px) + var(--wp-admin--admin-bar--height, 0px));
-	margin-top: var(--wp-admin--admin-bar--height, 0);
 	height: unset; /* Let height use default browser height. */
 }