http: remove ClientRequest.prototype.pause()

ClientRequest.prototype.pause() is not needed. ClientRequest is a writable
stream and deferring to OutgoingMessage.prototype.pause() is broken, the method
does not exist.

Author: xenyou

lib/http.js

@@ -1431,12 +1431,6 @@ ClientRequest.prototype.setNoDelay = function() {
 ClientRequest.prototype.setSocketKeepAlive = function() {
   this._deferToConnect('setKeepAlive', arguments);
 };
-ClientRequest.prototype.pause = function() {
-  var self = this;
-  self._deferToConnect(null, null, function() {
-    OutgoingMessage.prototype.pause.apply(self, []);
-  });
-};
 
 
 exports.request = function(options, cb) {