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>
diff --git a/BUILD.gn b/BUILD.gn
deleted file mode 100644
index d4e5220..0000000
--- a/BUILD.gn
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2018 Google Inc.
-#
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import("skcms.gni")
-
-config("skcms_public") {
-  include_dirs = [ "." ]
-}
-
-source_set("skcms") {
-  public_configs = [ ":skcms_public" ]
-
-  cflags = []
-  if (!is_win || is_clang) {
-    cflags += [
-      "-w",
-      "-std=c11",
-    ]
-  }
-
-  defines = [ "SKCMS_LEGACY_POWF" ]
-  public = [
-    "skcms.h",
-  ]
-  sources = skcms_sources
-}