Remove payload module

lib/context.js

@@ -1,10 +1,8 @@
-const Payload = require('./payload');
-
 module.exports = class Context {
   constructor(github, event) {
     this.github = github;
     this.event = event;
-    this.payload = new Payload(event.payload);
+    this.payload = event.payload;
   }
 
   toRepo(object) {

lib/payload.js

@@ -1,5 +0,0 @@
-module.exports = class Payload {
-  constructor(params) {
-    Object.assign(this, params);
-  }
-};