Remove unused testing files in Sky

sky/engine/platform/testing/TreeTestHelpers.h

-/*
- * Copyright (C) 2010 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- * 2.  Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-// Simple pseudorandom number generator helper functions, used by the
-// red-black and interval tree tests.
-//
-// These are **not** thread safe!
-
-#ifndef SKY_ENGINE_PLATFORM_TESTING_TREETESTHELPERS_H_
-#define SKY_ENGINE_PLATFORM_TESTING_TREETESTHELPERS_H_
-
-#include <stdint.h>
-
-namespace blink {
-namespace TreeTestHelpers {
-
-// Initializes the pseudo-random number generator with a specific seed.
-void initRandom(const int32_t seed);
-
-// Produces the next pseudo-random number in the sequence, in the
-// range from [0..maximumValue). Negative numbers are not allowed and will
-// produce undefined results.
-int32_t nextRandom(const int32_t maximumValue);
-
-} // namespace TreeTestHelpers
-} // namespace blink
-
-#endif  // SKY_ENGINE_PLATFORM_TESTING_TREETESTHELPERS_H_