remove placeholder mds

docs/.vitepress/config.mts

@@ -10,16 +10,15 @@ export default defineConfig({
     // https://vitepress.dev/reference/default-theme-config
     nav: [
       { text: 'Home', link: '/' },
-      { text: 'Examples', link: '/markdown-examples' }
     ],
 
     sidebar: [
       {
-        text: 'Examples',
-        items: [
-          { text: 'Markdown Examples', link: '/markdown-examples' },
-          { text: 'Runtime API Examples', link: '/api-examples' }
-        ]
+        text: 'Preview',
+        // items: [
+        //   { text: 'Markdown Examples', link: '/markdown-examples' },
+        //   { text: 'Runtime API Examples', link: '/api-examples' }
+        // ]
       }
     ],