Merge pull request #13009 from CesiumGS/remove-banner

Remove banner pointing to legacy sandcastle

Author: jjhembd

packages/sandcastle/src/App.css

@@ -4,20 +4,9 @@
   height: 100vh;
   --header-height: min-content;
   --app-bar-width: 53px;
-  grid-template-rows: min-content var(--header-height) auto;
+  grid-template-rows: var(--header-height) auto;
   grid-template-columns: var(--app-bar-width) auto;
-  grid-template-areas: "banner banner" "header header" "app-bar content";
-
-  .banner {
-    grid-area: banner;
-    background: var(--stratakit-color-bg-elevation-overlay);
-    padding: var(--stratakit-space-x2);
-    text-align: center;
-
-    a {
-      color: var(--stratakit-color-text-accent-base);
-    }
-  }
+  grid-template-areas: "header header" "app-bar content";
 
   --highlight-color-bg: var(--stratakit-color-bg-accent-muted);
   --highlight-color-bg-hover: color-mix(

packages/sandcastle/src/App.tsx

@@ -487,14 +487,6 @@ function App() {
       colorScheme={settings.theme}
       synchronizeColorScheme
     >
-      <div className="banner">
-        <Anchor
-          href="https://cesium.com/downloads/cesiumjs/releases/1.134/Apps/Sandcastle/index.html"
-          tone="accent"
-        >
-          Looking for the old Sandcastle? It's still here (for a little while) →
-        </Anchor>
-      </div>
       <header className="header">
         <a className="logo" href={getBaseUrl()}>
           <img