message: Remove yarn stuff
diff: @@ -6,12 +6,11 @@ Make sure you have installed:
  - [`node.js`](https://nodejs.org/)
  - `npm`
  -- `yarn`
  - the [`tslint`](https://marketplace.visualstudio.com/items?itemName=ms-vscode.vscode-typescript-tslint-plugin) extension for VS Code (recommended)
  Then run
  - yarn install
  + npm install
  inside the extension workspace to download the node modules needed to build the extension.
  