Remove some prototype code that snuck into one of my commits.

runtime/lib/isolate_patch.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "dart:collection" show HashMap;
 import "dart:_internal";
 
 patch class ReceivePort {
   /* patch */ factory ReceivePort() = _ReceivePortImpl;
 
@@ skipping 112 matching lines @@
 
   bool operator==(var other) {
     return (other is _RawReceivePortImpl) &&
         (this._get_id() == other._get_id());
   }
 
   int get hashCode {
     return sendPort.hashCode;
   }
 
-  Uri get remotePortUri => new Uri.https('localhost', '55');
-
   /**** Internal implementation details ****/
   _get_id() native "RawReceivePortImpl_get_id";
   _get_sendport() native "RawReceivePortImpl_get_sendport";
 
   // Called from the VM to retrieve the handler for a message.
   static _lookupHandler(int id) {
     var result = _handlerMap[id];
     return result;
   }
 
@@ skipping 319 matching lines @@
   static Isolate _getCurrentIsolate() {
     List portAndCapabilities = _getPortAndCapabilitiesOfCurrentIsolate();
     return new Isolate(portAndCapabilities[0],
                        pauseCapability: portAndCapabilities[1],
                        terminateCapability: portAndCapabilities[2]);
   }
 
   static List _getPortAndCapabilitiesOfCurrentIsolate()
       native "Isolate_getPortAndCapabilitiesOfCurrentIsolate";
 }