code simplifications

Author: brandonrobertz

lib/request.js

@@ -156,20 +156,8 @@ Request.prototype.end = function (s) {
 
 Request.prototype.setTimeout = function(msecs, callback) {
   if (callback) this.once('timeout', callback);
-
-  var self = this;
-  function emitTimeout() {
-    self.emit('timeout');
-  }
- 
-  // set and handle the timeout signals on xhr
-  if (this.xhr) {
-    if (this.timeoutCb) {
-      this.xhr.ontimeout = this.timeoutCb;
-    }
-    this.timeoutCb = emitTimeout;
-    this.xhr.timeout = msecs;
-  }
+  this.xhr.ontimeout = this.emit.bind(this, 'timeout');
+  this.xhr.timeout = msecs;
 };
 
 // Taken from http://dxr.mozilla.org/mozilla/mozilla-central/content/base/src/nsXMLHttpRequest.cpp.html