Remove the cd/start commands (#423)

They're already recommended by the create-react-app command

Author: nickserv

docs/introduction/quick-start.md

@@ -54,8 +54,6 @@ The recommended way to start new apps with React and Redux Toolkit is by using t
 
 ```sh
 npx create-react-app my-app --template redux
-cd my-app
-npm start
 ```
 
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