Reorganize tests for samples so the test is discoverable from the sample

samples/tests/samples/standalone/time_test.dart

Index: samples/tests/samples/standalone/time_test.dart
diff --git a/samples/tests/samples/standalone/time_test.dart b/samples/tests/samples/standalone/time_test.dart
deleted file mode 100644
index 32a8726ccaba707e59d14c9eb5589b446682c6d3..0000000000000000000000000000000000000000
--- a/samples/tests/samples/standalone/time_test.dart
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright (c) 2013, 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 '../../../time/time_server.dart' as time;
-
-// @static-clean
-
-/**
- * This test exists to ensure that the time sample compiles without errors.
- */
-void main() {
-
-}