Remove React, PureComponent global import, added those imports to files directly

• Remove:
- React, PureComponent global import and added those imports to files directly

config/webpack/shared.js

@@ -63,8 +63,6 @@ module.exports = {
 
   plugins: [
     new webpack.ProvidePlugin({
-      React: 'react',
-      PureComponent: ['react', 'PureComponent'],
       connect: ['react-redux', 'connect'],
       PropTypes: 'prop-types',
       _s: `${resolve(settings.source_path)}/styles/global.css`,