Finish delete of SkNinePatch

TBR=djsollen@google.com
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2206333002

Review-Url: https://codereview.chromium.org/2206333002

gyp/utils.gypi

@@ -55,7 +55,6 @@
         '<(skia_src_path)/utils/SkMatrix22.h',
         '<(skia_src_path)/utils/SkMeshUtils.cpp',
         '<(skia_src_path)/utils/SkMultiPictureDocument.cpp',
-        '<(skia_src_path)/utils/SkNinePatch.cpp',
         '<(skia_src_path)/utils/SkNWayCanvas.cpp',
         '<(skia_src_path)/utils/SkNullCanvas.cpp',
         '<(skia_src_path)/utils/SkOSFile.cpp',

src/utils/SkNinePatch.cpp

@@ -1,6 +0,0 @@
-/*
- * Copyright 2006 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */