Standardizes instances of removeHeader to remove

Author: lourd

lib/response.js

@@ -135,9 +135,9 @@ module.exports = {
     // no content
     if (null == val) {
       if (!statuses.empty[this.status]) this.status = 204;
-      this.res.removeHeader('Content-Type');
-      this.res.removeHeader('Content-Length');
-      this.res.removeHeader('Transfer-Encoding');
+      this.remove('Content-Type');
+      this.remove('Content-Length');
+      this.remove('Transfer-Encoding');
       return;
     }