Clean up packages, remove DRM.

package.json

@@ -11,7 +11,6 @@
   "dependencies": {
     "body-parser": "^1.18.3",
     "express": "^4.16.3",
-    "multer": "^1.3.1",
-    "multiparty": "^4.2.1"
+    "multer": "^1.3.1"
   }
 }

server.js

@@ -13,7 +13,7 @@ const app = express()
 app.use(express.static('./public'))
 
 app.post('/edit', upload.single('document'), (req, res) => {
-    childProcess.exec(`"${PDF2HTMLEX_PATH}" "${req.file.path}" "${req.file.path}.html"`, (err, stdout, stderr) => {
+    childProcess.exec(`"${PDF2HTMLEX_PATH}" --no-drm 1 "${req.file.path}" "${req.file.path}.html"`, (err, stdout, stderr) => {
         if (err) {
             res.status(500).send(`<pre>${err}\n\n${stdout}\n\n${stderr}</pre>`)
         } else {