How to Hide Social Locker Admin Menus

function plt_hide_social_locker_menus() {
	//Hide "Social Locker".
	remove_menu_page('edit.php?post_type=opanda-item');
	//Hide "Social Locker → All Lockers".
	remove_submenu_page('edit.php?post_type=opanda-item', 'edit.php?post_type=opanda-item');
	//Hide "Social Locker → + New Locker".
	remove_submenu_page('edit.php?post_type=opanda-item', 'new-item-bizpanda');
	//Hide "Social Locker → Leads (0)".
	remove_submenu_page('edit.php?post_type=opanda-item', 'leads-bizpanda');
	//Hide "Social Locker → Stats & Reports".
	remove_submenu_page('edit.php?post_type=opanda-item', 'stats-bizpanda');
	//Hide "Social Locker → Global Settings".
	remove_submenu_page('edit.php?post_type=opanda-item', 'settings-bizpanda');
	//Hide "Social Locker → How to use?".
	remove_submenu_page('edit.php?post_type=opanda-item', 'how-to-use-bizpanda');
	//Hide "Social Locker → License Manager".
	remove_submenu_page('edit.php?post_type=opanda-item', 'license-manager-sociallocker-next');
	//Hide "Social Locker → Go Premium".
	remove_submenu_page('edit.php?post_type=opanda-item', 'premium-sociallocker-next');
}

add_action('admin_menu', 'plt_hide_social_locker_menus', 11);
Where do I put this code?