clean code

packages/app/src/server/routes/hackmd.js

@@ -3,7 +3,6 @@ import loggerFactory from '~/utils/logger';
 /* eslint-disable no-use-before-define */
 
 const logger = loggerFactory('growi:routes:hackmd');
-const path = require('path');
 
 const hackmdFiles = require('@growi/hackmd');
 const axios = require('axios');