Remove unnecessary that/this conversion

Author: dtaniwaki

lib/configproxy.js

@@ -361,7 +361,6 @@ class ConfigurableProxy extends EventEmitter {
   deleteRoutes(req, res, path) {
     // DELETE removes an existing route
 
-    var that = this;
     return this._routes.get(path).then((result) => {
       var p, code;
       if (result) {
@@ -374,7 +373,7 @@ class ConfigurableProxy extends EventEmitter {
       return p.then(() => {
         res.writeHead(code);
         res.end();
-        that.metrics.apiRouteDeleteCount.inc();
+        this.metrics.apiRouteDeleteCount.inc();
       });
     });
   }
@@ -629,10 +628,9 @@ class ConfigurableProxy extends EventEmitter {
   handleApiRequest(req, res) {
     // Handle a request to the REST API
     if (res) {
-      var that = this;
       res.on("finish", () => {
-        that.metrics.requestsApiCount.labels(res.statusCode).inc();
-        that.logResponse(req, res);
+        this.metrics.requestsApiCount.labels(res.statusCode).inc();
+        this.logResponse(req, res);
       });
     }
     var args = [req, res];