How to Hide CyberSEO Lite (CyberSyn) Admin Menus

function plt_hide_cybersyn_menus() {
	//Hide "CyberSEO Lite".
	remove_menu_page('cyberseo_lite');
	//Hide "CyberSEO Lite → CyberSEO Lite".
	remove_submenu_page('cyberseo_lite', 'cyberseo_lite');
	//Hide "CyberSEO Lite → General Settings".
	remove_submenu_page('cyberseo_lite', 'cyberseo_lite_general_settings');
	//Hide "CyberSEO Lite → Content Spinners".
	remove_submenu_page('cyberseo_lite', 'cyberseo_lite_spinners');
	//Hide "CyberSEO Lite → Get CyberSEO Pro ⭐".
	remove_submenu_page('cyberseo_lite', 'cyberseo_lite_upgrade_to_premium');
}

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

Where do I put this code?