message: remove BaseCSS component; load built css
diff: @@ -2,20 +2,6 @@ import React from 'react'
  import Document, {Head, Main, NextScript} from 'next/document'
  import {ServerStyleSheet} from 'styled-components'
  -/* eslint-disable react/no-danger */
  -const BaseCSS = ({css}) => (
  - <style
  - dangerouslySetInnerHTML={{
  - __html: css
  - }}
  - />
  -)
  -/* eslint-enable */
  -
  -BaseCSS.defaultProps = {
  - css: '*{box-sizing:border-box}body{margin:0}'
  -}
  -
  export default class MyDocument extends Document {
  static getInitialProps({renderPage}) {
  const sheet = new ServerStyleSheet()
  @@ -41,11 +27,11 @@ export default class MyDocument extends Document {
  <link rel="apple-touch-icon" href="/assets/apple-touch-icon.png" />
  <meta name="og:title" content="Primer React" />
  <meta name="description" content="Primer components built with React.js." />
  + <link rel="stylesheet" href="/dist/css/build.css" />
  {primerCSSModules &&
  primerCSSModules.map(name => (
  <link rel="stylesheet" href={`https://unpkg.com/primer-${name}/build/build.css`} key={name} />
  ))}
  - <BaseCSS />
  {styles}
  </Head>
  <body>
  