How to Hide CAPTCHA 4WP Admin Menus

function plt_hide_advanced_nocaptcha_recaptcha_menus() {
	//Hide "CAPTCHA 4WP".
	remove_menu_page('c4wp-admin-captcha');
	//Hide "CAPTCHA 4WP → CAPTCHA Configuration".
	remove_submenu_page('c4wp-admin-captcha', 'c4wp-admin-captcha');
	//Hide "CAPTCHA 4WP → Form Placements".
	remove_submenu_page('c4wp-admin-captcha', 'c4wp-admin-forms');
	//Hide "CAPTCHA 4WP → Premium Features ➤".
	remove_submenu_page('c4wp-admin-captcha', 'c4wp-admin-upgrade');
	//Hide "CAPTCHA 4WP → Settings".
	remove_submenu_page('c4wp-admin-captcha', 'c4wp-admin-settings');
	//Hide "CAPTCHA 4WP → Help  Contact Us".
	remove_submenu_page('c4wp-admin-captcha', 'c4wp-admin-help');
}

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

Where do I put this code?