When was SkPDiff last used?

tools/skpdiff/skpdiff_util.h

Index: tools/skpdiff/skpdiff_util.h
diff --git a/tools/skpdiff/skpdiff_util.h b/tools/skpdiff/skpdiff_util.h
deleted file mode 100644
index f626ac99dfaeb32d9b321974e9544442b171b3ab..0000000000000000000000000000000000000000
--- a/tools/skpdiff/skpdiff_util.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef skpdiff_util_DEFINED
-#define skpdiff_util_DEFINED
-
-#include "SkString.h"
-#include "SkTArray.h"
-
-#if SK_SUPPORT_OPENCL
-#if defined(SK_BUILD_FOR_MAC)
-#   include <OpenCL/cl.h>
-#else
-#   include <CL/cl.h>
-#endif
-
-/**
- * Converts an OpenCL error number into the string of its enumeration name.
- * @param  err The OpenCL error number
- * @return The string of the name of the error; "UNKOWN" if the error number is invalid
- */
-const char* cl_error_to_string(cl_int err);
-#endif
-
-/**
- * Get a positive monotonic real-time measure of the amount of seconds since some undefined epoch.
- * Maximum precision is the goal of this routine.
- * @return Amount of time in seconds since some epoch
- */
-double get_seconds();
-
-/**
- * Get file entries of the given directory.
- * @param  path    A path to a directory to enumerate
- * @param  entries A vector to return the results into
- * @return         True on success, false otherwise
- */
-bool get_directory(const char path[], SkTArray<SkString>* entries);
-
-/**
- * Gets the files that match the specified pattern in sorted order.
- * @param  globPattern The pattern to use. Patterns must be valid paths, optionally with wildcards (*)
- * @param  entries     An array to return the results into
- * @return             True on success, false otherwise
- */
-bool glob_files(const char globPattern[], SkTArray<SkString>* entries);
-
-/**
- * Gets the absolute version of the given path.
- * @param  path The absolute or relative path to expand
- * @return      The absolute path of the given path on success, or an empty string on failure.
- */
-SkString get_absolute_path(const SkString& path);
-
-
-#endif