How to Hide the "WP Duplicate" Admin Menu

function plt_hide_local_sync_menus() {
	//Hide the "WP Duplicate" menu.
	remove_menu_page('local-sync/admin/views/local-sync-settings-display.php');
}

add_action('admin_menu', 'plt_hide_local_sync_menus', 11);

Where do I put this code?