Remove unnecessary bind

web/react/stores/socket_store.jsx

@@ -28,7 +28,6 @@ class SocketStoreClass extends EventEmitter {
         this.emitChange = this.emitChange.bind(this);
         this.addChangeListener = this.addChangeListener.bind(this);
         this.removeChangeListener = this.removeChangeListener.bind(this);
-        this.handleMessage = this.handleMessage.bind(this);
         this.sendMessage = this.sendMessage.bind(this);
         this.failCount = 0;