test rename overhaul: step 8 - language tests

tests/language/src/UnaryTest.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.
-
-// Dart test for testing binary operations.
-
-class UnaryTest {
-  static foo() { return 4; }
-  static moo() { return +5; }
-  static testMain() {
-    Expect.equals(9.0, (UnaryTest.foo() + UnaryTest.moo()));
-  }
-}
-
-main() {
-  UnaryTest.testMain();
-}