Moved Timer tests to the right directory.

tests/standalone/src/TimerCancel1Test.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.
 
 // Test that a timeout handler can cancel another.
 class TimerCancel1Test {
   static void testOtherCancel() {
     var canceleeTimer;
     var cancelerTimer;
 
@@ skipping 10 matching lines @@
   }
 
   static void testMain() {
     testOtherCancel();
   }
 }
 
 main() {
   TimerCancel1Test.testMain();
 }