How to Hide ApplicantPro Admin Menus

function plt_hide_applicantpro_menus() {
	//Hide the "ApplicantPro" menu.
	remove_menu_page('apppro_home');
	//Hide the "ApplicantPro → ApplicantPro" menu.
	remove_submenu_page('apppro_home', 'apppro_home');
	//Hide the "ApplicantPro → Settings" menu.
	remove_submenu_page('apppro_home', 'apppro_settings');
}

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

Where do I put this code?