How to Hide EasyMap Admin Menus

function plt_hide_easymap_menus() {
	//Hide "EasyMap".
	remove_menu_page('easymap');
	//Hide "EasyMap → Settings".
	remove_submenu_page('easymap', 'easymap');
	//Hide "EasyMap → Locations".
	remove_submenu_page('easymap', 'easymap-locations');
	//Hide "EasyMap → Export".
	remove_submenu_page('easymap', 'easymap-export');
	//Hide "EasyMap → Import".
	remove_submenu_page('easymap', 'easymap-import');
}

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

Where do I put this code?