[Vue3] Fixed usage of plugins

src/boot/plugins.ts

@@ -213,8 +213,6 @@ async function getBackend(): Promise<Backend | null> {
   }
 }
 
-// "async" is optional;
-// more info on params: https://quasar.dev/quasar-cli/cli-documentation/boot-files#Anatomy-of-a-boot-file
 export default boot(({ router, app, store }) => {
   const plugins: FG_Plugin.Plugin[] = [];