Remove frog from the repository.

frog/tests/await/try_catch_test.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.
-
-// The next line is used to tell test.dart that this test is run by invoking
-// awaitc.dart and passing this file as an argument (e.g. frog
-// frog/await/awaitc.dart test.dart):
-// VMOptions=frog/await/awaitc.dart
-
-// Await within a try-catch block, no error occurs.
-
-#import("await_test_helper.dart");
-
-noerror() {
-  try {
-    final t = await futureOf(0);
-    return t;
-  } catch (e) {
-    return -1;
-  }
-}
-
-main() {
-  int t = await noerror();
-  Expect.equals(0, t);
-}
-
-// The transformation is roughly as follows:
-// noerror() {
-//   final _ret = new Completer();
-//   _catch(Ex1 ex) {
-//     _ret.complete(-1);
-//   }
-//   try {
-//     final f = futureOf(0);
-//     f.then((t) {
-//       _ret.complete(t);
-//     });
-//     f.addExceptionHandler((ex) {
-//       if (ex is Ex1) {
-//         _catch(ex);
-//         return true;
-//       }
-//       return false;
-//     });
-//     Futures.propagateError(f, _ret);
-//     return _ret;
-//   } catch(Ex1 ex) {
-//      _catch(ex);
-//      return _ret;
-//   }
-// }