How to Hide Kitgenix CAPTCHA for Cloudflare Turnstile Admin Menus

function plt_hide_kitgenix_captcha_for_cloudflare_turnstile_menus() {
	//Hide the "Kitgenix" menu.
	remove_menu_page('kitgenix');
	//Hide the "Kitgenix → Kitgenix" menu.
	remove_submenu_page('kitgenix', 'kitgenix');
	//Hide the "Kitgenix → Cloudflare Turnstile" menu.
	remove_submenu_page('kitgenix', 'kitgenix-captcha-for-cloudflare-turnstile');
}

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

Where do I put this code?