remove reference to SkCullPoints (unused)

skia/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 if (current_cpu == "arm") {
   import("//build/config/arm.gni")
 }
@@ skipping 317 matching lines @@
     sources += gypi_skia_gpu.skgpu_sources
     sources += gypi_skia_gpu.skgpu_null_gl_sources
   }
 
   # Remove unused util files include in utils.gypi
   sources -= [
     "//third_party/skia/src/utils/SkBitmapHasher.cpp",
     "//third_party/skia/src/utils/SkBoundaryPatch.cpp",
     "//third_party/skia/src/utils/SkCamera.cpp",
     "//third_party/skia/src/utils/SkCubicInterval.cpp",
-    "//third_party/skia/src/utils/SkCullPoints.cpp",
     "//third_party/skia/src/utils/SkDumpCanvas.cpp",
     "//third_party/skia/src/utils/SkFrontBufferedStream.cpp",
     "//third_party/skia/src/utils/SkInterpolator.cpp",
     "//third_party/skia/src/utils/SkLayer.cpp",
     "//third_party/skia/src/utils/SkMD5.cpp",
     "//third_party/skia/src/utils/SkMeshUtils.cpp",
     "//third_party/skia/src/utils/SkNinePatch.cpp",
     "//third_party/skia/src/utils/SkOSFile.cpp",
     "//third_party/skia/src/utils/SkParsePath.cpp",
     "//third_party/skia/src/utils/SkSHA1.cpp",
@@ skipping 368 matching lines @@
     ]
 
     deps = [
       ":skia",
       "//base",
       "//base/test:test_support",
       "//build/config/sanitizers:deps",
     ]
   }
 }