Cleanup: Remove unused Windows script.
Cleanup: Remove unused Windows script.

Now that Visual Studio 2013 is the supported toolchain, this may not be
necessary and used by anyone anymore.

BUG=None
R=scottmg@chromium.org

Review URL: https://codereview.chromium.org/940123006

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#317514}

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