refactor: remove console.log call in docs

Author: simon360

docs/demos/components/AsynchronousRehydrator/AsynchronousRehydrator.rehydrator.js

@@ -10,8 +10,6 @@ const delayBy = delay => {
 export default async domNode => {
   const delay = domNode.getAttribute("data-delay");
 
-  console.log(delay);
-
   await delayBy(parseInt(delay));
 
   return <AsynchronousRehydrator isRehydrating={true} />;