perf: remove dead .charset set in res.jsonp

Author: dougwilson

History.md

@@ -29,6 +29,7 @@ unreleased
   * deps: vary@~1.1.2
     - perf: improve header token parsing speed
   * perf: re-use options object when generating ETags
+  * perf: remove dead `.charset` set in `res.jsonp`
 
 4.15.5 / 2017-09-24
 ===================

lib/response.js

@@ -314,7 +314,6 @@ res.jsonp = function jsonp(obj) {
 
   // jsonp
   if (typeof callback === 'string' && callback.length !== 0) {
-    this.charset = 'utf-8';
     this.set('X-Content-Type-Options', 'nosniff');
     this.set('Content-Type', 'text/javascript');