How to Hide OAuth Single Sign On - SSO (OAuth Client) Admin Menus

function plt_hide_miniorange_login_with_eve_online_google_facebook_menus() {
	//Hide "miniOrange OAuth".
	remove_menu_page('mo_oauth_settings');
	//Hide "miniOrange OAuth → Plugin Configuration".
	remove_submenu_page('mo_oauth_settings', 'mo_oauth_settings');
	//Hide "miniOrange OAuth → Free Trial".
	remove_submenu_page('mo_oauth_settings', '?page=mo_oauth_settings&tab=requestfordemo');
	//Hide "miniOrange OAuth → Add-ons".
	remove_submenu_page('mo_oauth_settings', '?page=mo_oauth_settings&tab=addons');
}

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

Where do I put this code?