chore: remove unused IconSun.svg and clean up Layout.astro styles (#604)

- remove unused `IconSun.svg`
- remove unused styles inside `Layout.astro`
- remove `autofocus: true` option in pagefind initialization

src/assets/icons/IconSun.svg

@@ -1 +0,0 @@
-<svg  xmlns="http://www.w3.org/2000/svg"  width="24"  height="24"  viewBox="0 0 24 24"  fill="none"  stroke="currentColor"  stroke-width="2"  stroke-linecap="round"  stroke-linejoin="round"  class="icon icon-tabler icons-tabler-outline icon-tabler-sun"><path stroke="none" d="M0 0h24v24H0z" fill="none"/><path d="M12 12m-4 0a4 4 0 1 0 8 0a4 4 0 1 0 -8 0" /><path d="M3 12h1m8 -9v1m8 8h1m-9 8v1m-6.4 -15.4l.7 .7m12.1 -.7l-.7 .7m0 11.4l.7 .7m-12.1 -.7l-.7 .7" /></svg>

src/layouts/Layout.astro

@@ -174,12 +174,3 @@ const structuredData = {
     <script src="../scripts/theme.ts"></script>
   </body>
 </html>
-
-<style>
-  html,
-  body {
-    margin: 0;
-    width: 100%;
-    height: 100%;
-  }
-</style>

src/pages/search.astro

@@ -45,7 +45,6 @@ const backUrl = SITE.showBackButton ? `${Astro.url.pathname}` : "/";
       // Init pagefind ui
       const search = new PagefindUI({
         element: "#pagefind-search",
-        autofocus: true,
         showImages: false,
         showSubResults: true,
         processTerm: function (term: string) {