Removed unused function.
Removed unused function.

This function has no implementation. It's a bummer the compiler
doesn't complain about this.

Review URL: https://codereview.chromium.org/134563002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@164904 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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