How to Hide Booking System Edoobox Admin Menus

function plt_hide_booking_system_edoobox_menus() {
	//Hide "edoobox".
	remove_menu_page('edoobox-system-view');
	//Hide "edoobox → Options".
	remove_submenu_page('edoobox-system-view', 'edoobox-system-view');
	//Hide "edoobox → Page Indexing".
	remove_submenu_page('edoobox-system-view', 'edoobox-page-view');
	//Hide "edoobox → Caching".
	remove_submenu_page('edoobox-system-view', 'edoobox-caching');
	//Hide "edoobox → Google Maps".
	remove_submenu_page('edoobox-system-view', 'edoobox-maps-google');
	//Hide "edoobox → Information".
	remove_submenu_page('edoobox-system-view', 'edoobox-information');
}

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

Where do I put this code?