⚡ perf(pages/stack): remove unused and problematic import

Author: retrozinndev

src/pages/[lang]/stack.astro

@@ -5,7 +5,6 @@ import LinkButton from "../../components/LinkButton.astro";
 import type { IconType } from "react-icons";
 import { BiLogoCss3, BiLogoGit, BiLogoGithub, BiLogoHtml5, BiLogoJava, BiLogoSass, BiLogoTypescript } from "react-icons/bi";
 import { SiAstro } from "react-icons/si";
-import { undefined } from "astro:schema";
 
 export { getStaticPaths };