Clean up some dead code.

tools/PictureRenderingFlags.h

-/*
- * 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 PICTURE_RENDERING_FLAGS
-#define PICTURE_RENDERING_FLAGS
-
-class SkString;
-
-namespace sk_tools {
-    class PictureRenderer;
-}
-
-enum PictureTool {
-    kBench_PictureTool,
-    kRender_PictureTool,
-};
-
-/**
- *  Uses SkCommandLineFlags to parse the command line, and returns a PictureRenderer
- *  reflecting the flags used. Assumes that SkCommandLineFlags::Parse has
- *  been called.
- *  @param error If there is an error or warning, it will be stored in error.
- *  @param tool Which tool is being used.
- *  @return PictureRenderer A PictureRenderer with the settings specified
- *          on the command line, or nullptr if the command line is invalid.
- */
-sk_tools::PictureRenderer* parseRenderer(SkString& error, PictureTool tool);
-
-#endif // PICTURE_RENDERING_FLAGS