Remove part about stateless components (#2694)

Author: jakubdrozdek

content/docs/react-without-jsx.md

@@ -40,7 +40,7 @@ ReactDOM.render(
 
 If you're curious to see more examples of how JSX is converted to JavaScript, you can try out [the online Babel compiler](babel://jsx-simple-example).
 
-The component can either be provided as a string, or as a subclass of `React.Component`, or a plain function for stateless components.
+The component can either be provided as a string, as a subclass of `React.Component`, or a plain function.
 
 If you get tired of typing `React.createElement` so much, one common pattern is to assign a shorthand: