docs: remove outdated documentation (#579)

README.md

@@ -4,8 +4,6 @@
 
 This is a minimal Electron application based on the [Quick Start Guide](https://electronjs.org/docs/latest/tutorial/quick-start) within the Electron documentation.
 
-**Use this app along with the [Electron API Demos](https://electronjs.org/#get-started) app for API code examples to help you get started.**
-
 A basic Electron application needs just these files:
 
 - `package.json` - Points to the app's main file and lists its details and dependencies.
@@ -36,8 +34,6 @@ Note: If you're using Linux Bash for Windows, [see this guide](https://www.howto
 - [electronjs.org/docs](https://electronjs.org/docs) - all of Electron's documentation
 - [electronjs.org/community#boilerplates](https://electronjs.org/community#boilerplates) - sample starter apps created by the community
 - [electron/electron-quick-start](https://github.com/electron/electron-quick-start) - a very basic starter Electron app
-- [electron/simple-samples](https://github.com/electron/simple-samples) - small applications with ideas for taking them further
-- [electron/electron-api-demos](https://github.com/electron/electron-api-demos) - an Electron app that teaches you how to use Electron
 - [hokein/electron-sample-apps](https://github.com/hokein/electron-sample-apps) - small demo apps for the various Electron APIs
 
 ## License