removed sample salt key

Author: shivasurya

sample/server.js

@@ -5,7 +5,7 @@ var bodyParser = require('body-parser');
 var instamojoWebhook = require("./index");
 
 app.use(bodyParser());
-var instamojoMiddleWare = instamojoWebhook({ secretKey: '270afc61a4ec4307a89a0bb8ebc1512b'});
+var instamojoMiddleWare = instamojoWebhook({ secretKey: 'your salt key'});
 
 app.post("/",instamojoMiddleWare,function(req,res){
   console.log(req.instamojo);