Revert of Add vulkan files into skia repo.

src/gpu/vk/GrVkIndexBuffer.h

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrVkIndexBuffer_DEFINED
-#define GrVkIndexBuffer_DEFINED
-
-#include "GrIndexBuffer.h"
-#include "GrVkBuffer.h"
-#include "vk/GrVkInterface.h"
-
-class GrVkGpu;
-
-class GrVkIndexBuffer : public GrIndexBuffer, public GrVkBuffer {
-
-public:
-    static GrVkIndexBuffer* Create(GrVkGpu* gpu, size_t size, bool dynamic);
-
-protected:
-    void onAbandon() override;
-    void onRelease() override;
-
-private:
-    GrVkIndexBuffer(GrVkGpu* gpu, const GrVkBuffer::Desc& desc,
-                    const GrVkBuffer::Resource* resource);
-
-    void* onMap() override;
-    void onUnmap() override;
-    bool onUpdateData(const void* src, size_t srcSizeInBytes) override;
-
-    GrVkGpu* getVkGpu() const;
-
-    typedef GrIndexBuffer INHERITED;
-};
-
-#endif