remove redundant require

Author: sarahs

lib/page.js

@@ -19,7 +19,6 @@ const readFileContents = require('./read-file-contents')
 const getLinkData = require('./get-link-data')
 const getDocumentType = require('./get-document-type')
 const union = require('lodash/union')
-const getDocumentType = require('./get-document-type')
 
 class Page {
   static async init (opts) {