Remove some unused code.

sdk/lib/_internal/pub/test/serve/utils.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.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 pub_tests;
 
 import 'dart:async';
 
 import 'package:http/http.dart' as http;
 import 'package:scheduled_test/scheduled_process.dart';
@@ skipping 68 matching lines @@
     return _pubServer.nextLine().then((line) {
       if (line.contains("successfully")) return;
 
       // This line wasn't it, so ignore it and keep trying.
       return nextLine();
     });
   }
 
   schedule(nextLine);
 }
-
-/// Returns a [Future] that completes after pumping the event queue [times]
-/// times. By default, this should pump the event queue enough times to allow
-/// any code to run, as long as it's not waiting on some external event.
-Future _pumpEventQueue([int times=20]) {
-  if (times == 0) return new Future.value();
-  // We use a delayed future to allow runAsync events to finish. The
-  // Future.value or Future() constructors use runAsync themselves and would
-  // therefore not wait for runAsync callbacks that are scheduled after invoking
-  // this method.
-  return new Future.delayed(Duration.ZERO, () => _pumpEventQueue(times - 1));
-}