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diff --git a/src/ceph/src/librbd/cache/ImageWriteback.h b/src/ceph/src/librbd/cache/ImageWriteback.h
deleted file mode 100644
index 9bc9b5e..0000000
--- a/src/ceph/src/librbd/cache/ImageWriteback.h
+++ /dev/null
@@ -1,54 +0,0 @@
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#ifndef CEPH_LIBRBD_CACHE_IMAGE_WRITEBACK
-#define CEPH_LIBRBD_CACHE_IMAGE_WRITEBACK
-
-#include "include/buffer_fwd.h"
-#include "include/int_types.h"
-#include <vector>
-
-class Context;
-
-namespace librbd {
-
-struct ImageCtx;
-
-namespace cache {
-
-/**
- * client-side, image extent cache writeback handler
- */
-template <typename ImageCtxT = librbd::ImageCtx>
-class ImageWriteback {
-public:
-  typedef std::vector<std::pair<uint64_t,uint64_t> > Extents;
-
-  ImageWriteback(ImageCtxT &image_ctx);
-
-  void aio_read(Extents &&image_extents, ceph::bufferlist *bl,
-                int fadvise_flags, Context *on_finish);
-  void aio_write(Extents &&image_extents, ceph::bufferlist&& bl,
-                 int fadvise_flags, Context *on_finish);
-  void aio_discard(uint64_t offset, uint64_t length,
-                   bool skip_partial_discard, Context *on_finish);
-  void aio_flush(Context *on_finish);
-  void aio_writesame(uint64_t offset, uint64_t length,
-                     ceph::bufferlist&& bl,
-                     int fadvise_flags, Context *on_finish);
-  void aio_compare_and_write(Extents &&image_extents,
-                             ceph::bufferlist&& cmp_bl,
-                             ceph::bufferlist&& bl,
-                             uint64_t *mismatch_offset,
-                             int fadvise_flags, Context *on_finish);
-private:
-  ImageCtxT &m_image_ctx;
-
-};
-
-} // namespace cache
-} // namespace librbd
-
-extern template class librbd::cache::ImageWriteback<librbd::ImageCtx>;
-
-#endif // CEPH_LIBRBD_CACHE_IMAGE_WRITEBACK