removed unnecessary Page component

src/views/join/join.jsx

@@ -2,8 +2,6 @@ const React = require('react');
 const render = require('../../lib/render.jsx');
 const Scratch3Registration = require('../../components/registration/scratch3-registration.jsx');
 const ErrorBoundary = require('../../components/errorboundary/errorboundary.jsx');
-// Require this even though we don't use it because, without it, webpack runs out of memory...
-const Page = require('../../components/page/www/page.jsx'); // eslint-disable-line no-unused-vars
 
 const initSentry = require('../../lib/sentry.js');
 initSentry();