docs: remove unused styles

Author: atinux

docs/app.vue

@@ -75,21 +75,3 @@ provide('navigation', navigation)
     <LazyUDocsSearch :files="files" :navigation="navigation" :links="links" />
   </ClientOnly>
 </template>
-
-<style>
-html.dark {
-  color-scheme: dark;
-}
-
-.shiki {
-  padding: 0.6rem;
-  border-radius: 0.2rem;
-  border: 1px solid #8882;
-}
-
-html.dark .shiki,
-html.dark .shiki span {
-  color: var(--s-dark) !important;
-  background-color: var(--s-dark-bg) !important;
-}
-</style>