chore: Remove unused qs dependency

package.json

@@ -73,7 +73,6 @@
     "ps-tree": "^1.0.0",
     "push-notify": "^1.1.1",
     "q": "^1.4.1",
-    "qs": "^2.3.2",
     "request": "~2.44.0",
     "s3-upload-stream": "^1.0.6",
     "serve-favicon": "^2.3.0",

website/src/controllers/api-v2/user.js

@@ -15,7 +15,6 @@ let acceptablePUTPaths;
 let restrictedPUTSubPaths;
 
 var api = module.exports;
-var qs = require('qs');
 var firebase = require('../../libs/firebase');
 var webhook = require('../../libs/webhook');