Remove green 'Vue 3 is official version' banner

Author: nicodevs

.vitepress/theme/index.ts

@@ -1,7 +1,6 @@
 import './styles/index.css'
 import { h, App } from 'vue'
 import { VPTheme } from '@vue/theme'
-import Banner from './components/Banner.vue'
 import PreferenceSwitch from './components/PreferenceSwitch.vue'
 import VueSchoolLink from './components/VueSchoolLink.vue'
 import VueSchoolBanner from './components/VueSchoolBanner.vue'
@@ -18,8 +17,7 @@ export default Object.assign({}, VPTheme, {
     // @ts-ignore
     return h(VPTheme.Layout, null, {
       banner: () => h('div', {}, [
-        h(VueSchoolBanner),
-        h(Banner)
+        h(VueSchoolBanner)
       ]),
       'sidebar-top': () => h(PreferenceSwitch),
       'aside-mid': () => h(SponsorsAside),