How to Hide NewStatPress Admin Menus

function plt_hide_newstatpress_menus() {
	//Hide "NewStatPress".
	remove_menu_page('nsp-main');
	//Hide "NewStatPress → Overview".
	remove_submenu_page('nsp-main', 'nsp-main');
	//Hide "NewStatPress → Details".
	remove_submenu_page('nsp-main', 'nsp_details');
	//Hide "NewStatPress → Visits".
	remove_submenu_page('nsp-main', 'nsp_visits');
	//Hide "NewStatPress → Search".
	remove_submenu_page('nsp-main', 'nsp_search');
	//Hide "NewStatPress → Tools".
	remove_submenu_page('nsp-main', 'nsp_tools');
	//Hide "NewStatPress → Options".
	remove_submenu_page('nsp-main', 'nsp_options');
	//Hide "NewStatPress → Credits".
	remove_submenu_page('nsp-main', 'nsp_credits');
}

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

Where do I put this code?