Remove SkOSFile.cpp.

This file has been renamed SkOSPath.cpp and users no longer refer to the
old name. Remove this now empty file and its build rule.

Change-Id: I5041b61e749cc86f491b6c99b6744d7a0d4f9d1c
Reviewed-on: https://skia-review.googlesource.com/4766
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Ben Wagner <bungeman@google.com>
diff --git a/gn/utils.gni b/gn/utils.gni
index 4e414b9..a08e60b 100644
--- a/gn/utils.gni
+++ b/gn/utils.gni
@@ -54,7 +54,6 @@
   "$_src/utils/SkMultiPictureDocument.cpp",
   "$_src/utils/SkNWayCanvas.cpp",
   "$_src/utils/SkNullCanvas.cpp",
-  "$_src/utils/SkOSFile.cpp",
   "$_src/utils/SkOSPath.cpp",
   "$_src/utils/SkOSPath.h",
   "$_src/utils/SkPaintFilterCanvas.cpp",
diff --git a/src/utils/SkOSFile.cpp b/src/utils/SkOSFile.cpp
deleted file mode 100644
index e10e674..0000000
--- a/src/utils/SkOSFile.cpp
+++ /dev/null
@@ -1,6 +0,0 @@
-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */