How to Hide Translate by Supsystic Admin Menus

function plt_hide_translate_by_supsystic_menus() {
	//Hide "Translate by Supsystic".
	remove_menu_page('translate-by-supsystic');
	//Hide "Translate by Supsystic → Translate by Supsystic".
	remove_submenu_page('translate-by-supsystic', 'translate-by-supsystic');
	//Hide "Translate by Supsystic → Overview".
	remove_submenu_page('translate-by-supsystic', 'admin.php?page=translate-by-supsystic&tab=overview');
	//Hide "Translate by Supsystic → Settings".
	remove_submenu_page('translate-by-supsystic', 'admin.php?page=translate-by-supsystic&tab=settings');
	//Hide "Translate by Supsystic → Featured Plugins".
	remove_submenu_page('translate-by-supsystic', 'admin.php?page=translate-by-supsystic&tab=featured-plugins');
}

add_action('admin_menu', 'plt_hide_translate_by_supsystic_menus', 11);
Where do I put this code?