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It is an empty target that was there for compatibility with GYP.

Nothing uses it anymore and thus it can be removed now.

The changes to the build side were already done here ->
https://chromium.googlesource.com/chromium/tools/build/+/1ba4afe62e56408169d479018801c04a2d8335ec

BUG=601920

Change-Id: I442368cc860dce8778fd0d064ef99bb3a854be11
Reviewed-on: https://chromium-review.googlesource.com/516982Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Thiago Farina <tfarina@chromium.org>
Cr-Commit-Position: refs/heads/master@{#476307}