Revert "add vue 2 nes banner (vuejs#2581)"

This reverts commit 662c7da.

Author: yyx990803

.vitepress/inlined-scripts/restorePreference.js

@@ -8,6 +8,6 @@
   restore('vue-docs-prefer-composition', 'prefer-composition', true)
   restore('vue-docs-prefer-sfc', 'prefer-sfc', true)
 
-  window.__VUE_BANNER_ID__ = 'herodevs-vue2-nes'
-  restore(`vue-docs-banner-${__VUE_BANNER_ID__}`, 'banner-dismissed')
+  // window.__VUE_BANNER_ID__ = ''
+  // restore(`vue-docs-banner-${__VUE_BANNER_ID__}`, 'banner-dismissed')
 })()