chore: clean up index.astro

app-shell/src/pages/index.astro

@@ -32,28 +32,14 @@ const appName = 'Scalable Shoe Shop'
 </html>
 
 <style>
-html {
+  html {
     font-family: system-ui, sans-serif;
     background-color: #f6f6f6;
-}
+  }
 
-main {
+  main {
     margin: auto;
     padding: 1.5rem;
     max-width: 60ch;
-}
-
-h1 {
-  font-size: 3rem;
-  font-weight: 800;
-  margin: 0;
-}
-</style>
-
-<script>
-  window.addEventListener('message', (event) => {
-    if (event.data.source === 'app-a') {
-      console.log('>>> message', event)
   }
-  })
-</script>
+</style>