How to Hide Responsive Lightbox & Gallery Admin Menus

function plt_hide_responsive_lightbox_menus() {
	//Hide "Gallery".
	remove_menu_page('edit.php?post_type=rl_gallery');
	//Hide "Gallery → All Galleries".
	remove_submenu_page('edit.php?post_type=rl_gallery', 'edit.php?post_type=rl_gallery');
	//Hide "Gallery → Add New Gallery".
	remove_submenu_page('edit.php?post_type=rl_gallery', 'post-new.php?post_type=rl_gallery');
	//Hide "Gallery → Categories".
	remove_submenu_page('edit.php?post_type=rl_gallery', 'edit-tags.php?taxonomy=rl_category&post_type=rl_gallery');
	//Hide "Gallery → Tags".
	remove_submenu_page('edit.php?post_type=rl_gallery', 'edit-tags.php?taxonomy=rl_tag&post_type=rl_gallery');

	//Hide "Lightbox".
	remove_menu_page('responsive-lightbox-settings');
	//Hide "Lightbox → General".
	remove_submenu_page('responsive-lightbox-settings', 'responsive-lightbox-settings');
	//Hide "Lightbox → Lightboxes".
	remove_submenu_page('responsive-lightbox-settings', 'responsive-lightbox-settings&tab=configuration');
	//Hide "Lightbox → Galleries".
	remove_submenu_page('responsive-lightbox-settings', 'responsive-lightbox-settings&tab=gallery');
	//Hide "Lightbox → Builder".
	remove_submenu_page('responsive-lightbox-settings', 'responsive-lightbox-settings&tab=builder');
	//Hide "Lightbox → Folders".
	remove_submenu_page('responsive-lightbox-settings', 'responsive-lightbox-settings&tab=folders');
	//Hide "Lightbox → Capabilities".
	remove_submenu_page('responsive-lightbox-settings', 'responsive-lightbox-settings&tab=capabilities');
	//Hide "Lightbox → Remote Library".
	remove_submenu_page('responsive-lightbox-settings', 'responsive-lightbox-settings&tab=remote_library');
	//Hide "Lightbox → Add-ons".
	remove_submenu_page('responsive-lightbox-settings', 'responsive-lightbox-settings&tab=addons');
}

add_action('admin_menu', 'plt_hide_responsive_lightbox_menus', 13);
Where do I put this code?