Remove unnecessary data-slot

Author: philipp-spiess

src/blog/vanilla-js-support-for-tailwind-plus/index.mdx

@@ -108,7 +108,7 @@ And here's what it looks like to build a [custom select](https://tailwindcss.com
         </span>
       </div>
       <span class="group-not-aria-selected/option:hidden group-focus/option:text-white in-[el-selectedcontent]:hidden ...">
-        <svg viewBox="0 0 20 20" fill="currentColor" data-slot="icon" aria-hidden="true" class="size-5">
+        <svg viewBox="0 0 20 20" fill="currentColor" aria-hidden="true" class="size-5">
             <!-- ... -->
         </svg>
       </span>