docs(vscode): remove outdated formatters section (vuejs#4243)

extensions/vscode/README.md

@@ -254,8 +254,3 @@ Finally you need to make VS Code recognize your new extension and automatically
 - [angular](https://github.com/angular/angular) shows how TS server plugin working with language service.
 - Syntax highlight is rewritten base on [vue-syntax-highlight](https://github.com/vuejs/vue-syntax-highlight).
 - [vscode-fenced-code-block-grammar-injection-example](https://github.com/mjbvz/vscode-fenced-code-block-grammar-injection-example) shows how to inject vue syntax highlight to markdown.
-- Out of the box formatting working by (If you would like to use other formatters, checkout https://github.com/vuejs/language-tools-plugins):
- - [vscode-html-languageservice](https://github.com/microsoft/vscode-html-languageservice): html
- - [vscode-css-languageservice](https://github.com/microsoft/vscode-css-languageservice): css, less, scss, postcss
- - [pug-beautify](https://github.com/vingorius/pug-beautify): pug
- - [typescript](https://github.com/microsoft/TypeScript): js, ts, jsx, tsx