Site Settings: Run codemods on composing (Automattic#18080)

* Apply codemod react-prop-types

* Remove some empty lines

client/my-sites/site-settings/composing/after-the-deadline.jsx

@@ -1,7 +1,8 @@
 /**
  * External dependencies
  */
-import React, { Component, PropTypes } from 'react';
+import PropTypes from 'prop-types';
+import React, { Component } from 'react';
 import { localize } from 'i18n-calypso';
 import { connect } from 'react-redux';
 

client/my-sites/site-settings/composing/default-post-format.jsx

@@ -1,7 +1,8 @@
 /**
  * External dependencies
  */
-import React, { PropTypes } from 'react';
+import PropTypes from 'prop-types';
+import React from 'react';
 import { localize } from 'i18n-calypso';
 import { connect } from 'react-redux';
 import { map } from 'lodash';

client/my-sites/site-settings/composing/index.jsx

@@ -1,7 +1,8 @@
 /**
  * External dependencies
  */
-import React, { PropTypes } from 'react';
+import PropTypes from 'prop-types';
+import React from 'react';
 import { connect } from 'react-redux';
 
 /**

client/my-sites/site-settings/composing/publish-confirmation.jsx

@@ -1,6 +1,7 @@
 /**
  * External dependencies
  */
+import PropTypes from 'prop-types';
 import React, { Component } from 'react';
 import { connect } from 'react-redux';
 import { localize } from 'i18n-calypso';
@@ -69,11 +70,11 @@ PublishConfirmation.defaultProps = {
 };
 
 PublishConfirmation.propTypes = {
- siteId: React.PropTypes.number,
- fetchingPreferences: React.PropTypes.bool,
- publishConfirmationEnabled: React.PropTypes.bool,
- savePublishConfirmationPreference: React.PropTypes.func,
- translate: React.PropTypes.func,
+ siteId: PropTypes.number,
+ fetchingPreferences: PropTypes.bool,
+ publishConfirmationEnabled: PropTypes.bool,
+ savePublishConfirmationPreference: PropTypes.func,
+ translate: PropTypes.func,
 };
 
 export default connect(