How to Hide Interactive World Map Admin Menus

function plt_hide_interactive_world_map_menus() {
	//Hide "Interactive World Map".
	remove_menu_page('freeworld-html5-map-options');
	//Hide "Interactive World Map → General Settings".
	remove_submenu_page('freeworld-html5-map-options', 'freeworld-html5-map-options');
	//Hide "Interactive World Map → Detailed settings".
	remove_submenu_page('freeworld-html5-map-options', 'freeworld-html5-map-states');
	//Hide "Interactive World Map → Tools".
	remove_submenu_page('freeworld-html5-map-options', 'freeworld-html5-map-tools');
	//Hide "Interactive World Map → Map Preview".
	remove_submenu_page('freeworld-html5-map-options', 'freeworld-html5-map-view');
	//Hide "Interactive World Map → Maps".
	remove_submenu_page('freeworld-html5-map-options', 'freeworld-html5-map-maps');
}

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

Where do I put this code?