remove promise from corelib

samples/tests/samples/src/proxy/MintMakerPromiseTest.dart

 // Copyright (c) 2011, 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.
 
+#library("MintMakerPromiseTest");
+#import("../../../../proxy/promise.dart");
+
 interface Mint default MintImpl {
 
   Mint();
 
   Purse createPurse(int balance);
 
 }
 
 
 class MintImpl implements Mint {
@@ skipping 217 matching lines @@
       reply("Exception: Command not understood");
     }
     //print("command $command done");
   }
 
 }
 
 main() {
   MintMakerPromiseTest.testMain();
 }