remove BUILD.gn

Both Skia and Chromium are now using skcms.gni.

Change-Id: If575f8083f8c6fa6313348def20ad8062e8657cc
Reviewed-on: https://skia-review.googlesource.com/128554
Auto-Submit: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed