How to Hide Image Hotspot - Map Image Annotation Admin Menus

function plt_hide_image_map_hotspots_menus() {
	//Hide "Image Map Hotspot".
	remove_menu_page('imh-6310-image-map-hotspot');
	//Hide "Image Map Hotspot → All Image Map Hotspot".
	remove_submenu_page('imh-6310-image-map-hotspot', 'imh-6310-image-map-hotspot');
	//Hide "Image Map Hotspot → Settings".
	remove_submenu_page('imh-6310-image-map-hotspot', 'imh-6310-image-map-hotspot-setting');
	//Hide "Image Map Hotspot → Import/Export Plugin".
	remove_submenu_page('imh-6310-image-map-hotspot', 'imh-6310-image-map-hotspot-import-export');
	//Hide "Image Map Hotspot → License".
	remove_submenu_page('imh-6310-image-map-hotspot', 'imh-6310-image-map-hotspot-license');
	//Hide "Image Map Hotspot → Help".
	remove_submenu_page('imh-6310-image-map-hotspot', 'imh-6310-image-map-hotspot-use');
	//Hide "Image Map Hotspot → WpMart Plugins".
	remove_submenu_page('imh-6310-image-map-hotspot', 'imh-6310-wpmart-plugins');
}

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

Where do I put this code?