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diff --git a/kaldi_io/src/kaldi/itf/clusterable-itf.h b/kaldi_io/src/kaldi/itf/clusterable-itf.h
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--- a/kaldi_io/src/kaldi/itf/clusterable-itf.h
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@@ -1,97 +0,0 @@
-// itf/clusterable-itf.h
-
-// Copyright 2009-2011     Microsoft Corporation;  Go Vivace Inc.
-
-// 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_ITF_CLUSTERABLE_ITF_H_
-#define KALDI_ITF_CLUSTERABLE_ITF_H_ 1
-
-#include <string>
-#include "base/kaldi-common.h"
-
-namespace kaldi {
-
-
-/** \addtogroup clustering_group
- @{
-  A virtual class for clusterable objects; see \ref clustering for an
-  explanation if its function.
-*/
-
-
-
-class Clusterable {
- public:
-  /// \name Functions that must be overridden
-  /// @{
-
-  /// Return a copy of this object.
-  virtual Clusterable *Copy() const = 0;
-  /// Return the objective function associated with the stats
-  /// [assuming ML estimation]
-  virtual BaseFloat Objf() const = 0;
-  /// Return the normalizer (typically, count) associated with the stats
-  virtual BaseFloat Normalizer() const = 0;
-  /// Set stats to empty.
-  virtual void SetZero() = 0;
-  /// Add other stats.
-  virtual void Add(const Clusterable &other) = 0;
-  /// Subtract other stats.
-  virtual void Sub(const Clusterable &other) = 0;
-  /// Scale the stats by a positive number f [not mandatory to supply this].
-  virtual void Scale(BaseFloat f) {
-    KALDI_ERR << "This Clusterable object does not implement Scale().";
-  }
-
-  /// Return a string that describes the inherited type. 
-  virtual std::string Type() const = 0;
-
-  /// Write data to stream.
-  virtual void Write(std::ostream &os, bool binary) const = 0;
-
-  /// Read data from a stream and return the corresponding object (const
-  /// function; it's a class member because we need access to the vtable
-  /// so generic code can read derived types).
-  virtual Clusterable* ReadNew(std::istream &os, bool binary) const = 0;
-
-  virtual ~Clusterable() {}
-
-  /// @}
-
-  /// \name Functions that have default implementations
-  /// @{
-
-  // These functions have default implementations (but may be overridden for
-  // speed). Implementatons in tree/clusterable-classes.cc
-
-  /// Return the objective function of the combined object this + other.
-  virtual BaseFloat ObjfPlus(const Clusterable &other) const;
-  /// Return the objective function of the subtracted object this - other.
-  virtual BaseFloat ObjfMinus(const Clusterable &other) const;
-  /// Return the objective function decrease from merging the two
-  /// clusters, negated to be a positive number (or zero).
-  virtual BaseFloat Distance(const Clusterable &other) const;
-  /// @}
-
-};
-/// @} end of "ingroup clustering_group"
-
-}  // end namespace kaldi
-
-#endif  // KALDI_ITF_CLUSTERABLE_ITF_H_
-