Fix actual code errors listed by linter.

src/components/App/NotFoundPage.js

@@ -1,7 +1,7 @@
 import React from 'react';
 
 export default () => (
-  <div class="nc-notFound-container">
+  <div className="nc-notFound-container">
     <h2>Not Found</h2>
   </div>
 );

src/components/EditorWidgets/Markdown/MarkdownControl/VisualEditor/__tests__/parser.spec.js

@@ -1,3 +1,4 @@
+import React from 'react';
 import { fromJS } from 'immutable';
 import { markdownToSlate } from 'EditorWidgets/Markdown/serializers';
 

src/components/UI/Icon/Icon.js

@@ -33,7 +33,7 @@ export const Icon = props => {
     className = '',
     width,
     height,
-    ...remainingProps,
+    ...remainingProps
   } = props;
   const icon = icons[type];
   const rotation = getRotation(icon.direction, direction)