How to Hide Multi Factor Authentication Admin Menus

function plt_hide_miniorange_login_security_menus() {
	//Hide "Users →".
	remove_submenu_page('users.php', 'reset');

	//Hide "Multi-factor Authentication".
	remove_menu_page('mo_2fa_two_fa');
	//Hide "Multi-factor Authentication → Two Factor".
	remove_submenu_page('mo_2fa_two_fa', 'mo_2fa_two_fa');
	//Hide "Multi-factor Authentication → Troubleshooting".
	remove_submenu_page('mo_2fa_two_fa', 'mo_2fa_troubleshooting');
	//Hide "Multi-factor Authentication → Account".
	remove_submenu_page('mo_2fa_two_fa', 'mo_2fa_account');
}

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

Where do I put this code?