Remove JSX and ES6 from spec
Remove JSX and ES6 from spec

To make adoption of this module as simple as possible, we are removing
ES6 and JSX syntax.

brigade/react-waypoint,NikolaIliev/react-waypoint,verbling/react-waypoint,realestate-com-au/react-waypoint,nickclaw/react-waypoint,brigade/react-waypoint,TheNounProject/react-waypoint,plain-vanilla-games/react-waypoint,tobiasquinn/react-waypoint