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diff --git a/kaldi_io/src/kaldi/tree/tree-renderer.h b/kaldi_io/src/kaldi/tree/tree-renderer.h
deleted file mode 100644
index 5e0b0d8..0000000
--- a/kaldi_io/src/kaldi/tree/tree-renderer.h
+++ /dev/null
@@ -1,84 +0,0 @@
-// tree/tree-renderer.h
-
-// Copyright 2012 Vassil Panayotov
-
-// See ../../COPYING for clarification regarding multiple authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//  http://www.apache.org/licenses/LICENSE-2.0
-//
-// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
-// MERCHANTABLITY OR NON-INFRINGEMENT.
-// See the Apache 2 License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef KALDI_TREE_TREE_RENDERER_H_
-#define KALDI_TREE_TREE_RENDERER_H_
-
-#include "base/kaldi-common.h"
-#include "tree/event-map.h"
-#include "util/common-utils.h"
-#include "hmm/transition-model.h"
-#include "fst/fstlib.h"
-
-namespace kaldi {
-
-// Parses a decision tree file and outputs its description in GraphViz format
-class TreeRenderer {
- public:
-  const static int32 kEdgeWidth; // normal width of the edges and state contours
-  const static int32 kEdgeWidthQuery; // edge and state width when in query
-  const static std::string kEdgeColor; // normal color for states and edges
-  const static std::string kEdgeColorQuery; // edge and state color when in query
-
-  TreeRenderer(std::istream &is, bool binary, std::ostream &os,
-               fst::SymbolTable &phone_syms, bool use_tooltips)
-      : phone_syms_(phone_syms), is_(is), out_(os), binary_(binary),
-        N_(-1), use_tooltips_(use_tooltips), next_id_(0) {}
-
-  // Renders the tree and if the "query" parameter is not NULL
-  // a distinctly colored trace corresponding to the event.
-  void Render(const EventType *query);
-
- private:
-  // Looks-up the next token from the stream and invokes
-  // the appropriate render method to visualize it
-  void RenderSubTree(const EventType *query, int32 id);
-
-  // Renders a leaf node (constant event map)
-  void RenderConstant(const EventType *query, int32 id);
-
-  // Renders a split event map node and the edges to the nodes
-  // representing YES and NO sets
-  void RenderSplit(const EventType *query, int32 id);
-
-  // Renders a table event map node and the edges to its (non-null) children
-  void RenderTable(const EventType *query, int32 id);
-
-  // Makes a comma-separated string from the elements of a set of identifiers
-  // If the identifiers represent phones, their symbolic representations are used
-  std::string MakeEdgeLabel(const EventKeyType &key,
-                            const ConstIntegerSet<EventValueType> &intset);
-
-  // Writes the GraphViz representation of a non-leaf node to the out stream
-  // A question about a phone from the context window or about pdf-class
-  // is used as a label.
-  void RenderNonLeaf(int32 id, const EventKeyType &key, bool in_query);
-
-  fst::SymbolTable &phone_syms_; // phone symbols to be used as edge labels
-  std::istream &is_; // the stream from which the tree is read
-  std::ostream &out_; // the GraphViz representation is written to this stream
-  bool binary_; // is the input stream binary?
-  int32 N_, P_; // context-width and central position
-  bool use_tooltips_;  // use tooltips(useful in e.g. SVG) instead of labels
-  int32 next_id_; // the first unused GraphViz node ID
-};
-
-} // namespace kaldi
-
-#endif //  KALDI_TREE_TREE_RENDERER_H_