chore: remove no longer needed vitepress style fix

Author: yyx990803

docs/.vitepress/theme/index.ts

@@ -5,9 +5,6 @@ import './styles/vars.css'
 import HomeSponsors from './components/HomeSponsors.vue'
 import AsideSponsors from './components/AsideSponsors.vue'
 import SvgImage from './components/SvgImage.vue'
-// temporary fix for vitepress not including component css when only
-// imported in a single page
-import './components/BlogIndex.vue'
 
 export default {
   extends: DefaultTheme,