refactor(site): english-only, remove i18n machinery

site/astro.config.mjs

@@ -5,11 +5,6 @@ import sitemap from "@astrojs/sitemap";
 
 export default defineConfig({
   site: "https://termscp.rs",
-  i18n: {
-    defaultLocale: "en",
-    locales: ["en", "zh-CN", "it", "fr", "es"],
-    routing: { prefixDefaultLocale: false },
-  },
   integrations: [sitemap()],
   vite: { plugins: [tailwindcss()] },
 });