experimental: remove old PDF benchmarking tools

experimental/tools/PageCachingDocument.h

Index: experimental/tools/PageCachingDocument.h
diff --git a/experimental/tools/PageCachingDocument.h b/experimental/tools/PageCachingDocument.h
deleted file mode 100644
index 19be1ae6197cad23b1a23c5a8fd805b8e733b146..0000000000000000000000000000000000000000
--- a/experimental/tools/PageCachingDocument.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#ifndef PageCachingDocument_DEFINED
-#define PageCachingDocument_DEFINED
-
-#include "SkScalar.h"
-
-class SkBitmap;
-class SkData;
-class SkDocument;
-class SkWStream;
-
-SkDocument* CreatePageCachingDocument(
-    SkWStream* stream,
-    void (*done)(SkWStream*, bool) = NULL,
-    SkData* (*encoder)(size_t*, const SkBitmap&) = NULL,
-    SkScalar rasterDpi = 72.0);
-#endif  // PageCachingDocument_DEFINED