How to Hide Builder Template Categories Admin Menus

function plt_hide_builder_template_categories_menus() {
	//Hide "Blocks".
	remove_menu_page('edit.php?post_type=wp_block');
	//Hide "Blocks → Blocks".
	remove_submenu_page('edit.php?post_type=wp_block', 'edit.php?post_type=wp_block');
	//Hide "Blocks → Add New".
	remove_submenu_page('edit.php?post_type=wp_block', 'post-new.php?post_type=wp_block');
	//Hide "Blocks → Block Categories".
	remove_submenu_page('edit.php?post_type=wp_block', 'edit-tags.php?taxonomy=builder-template-category&post_type=wp_block');
}

add_action('admin_menu', 'plt_hide_builder_template_categories_menus', 601);

Where do I put this code?