site: remove Svelte Summit banner (#5545)

site/src/routes/index.svelte

@@ -24,18 +24,6 @@
 		color: white;
 		overflow: hidden;
 	}
-
-	.banner {
-		background-color: #d6f1f5;
-		color: #333;
-    position: fixed;
-    bottom: 0;
-    width: 100vw;
-    text-align: center;
-    padding: 1em;
-    z-index: 999;
-		box-shadow: 0 0.2rem 1.2rem 0rem rgba(0,0,0,.3);
-	}
 </style>
 
 <svelte:head>
@@ -130,12 +118,3 @@ npm run dev
 
 	<Contributors/>
 </Section>
-
-<div class="banner"><strong>Svelte Summit 2020</strong> is happening today at 2pm GMT! 
-	<a
-		target="_blank"
-		rel="noopener noreferrer"
-		href="https://www.youtube.com/watch?v=vHHLLJA0b70">
-		Watch it on YouTube!
-	</a>
-</div>