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diff --git a/concept/Persistence_representations/Topological_data_with_scalar_product.h b/concept/Persistence_representations/Topological_data_with_scalar_product.h
deleted file mode 100644
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--- a/concept/Persistence_representations/Topological_data_with_scalar_product.h
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@@ -1,42 +0,0 @@
-/*    This file is part of the Gudhi Library. The Gudhi library
- *    (Geometric Understanding in Higher Dimensions) is a generic C++
- *    library for computational topology.
- *
- *    Author(s):       Pawel Dlotko
- *
- *    Copyright (C) 2016 Inria
- *
- *    This program is free software: you can redistribute it and/or modify
- *    it under the terms of the GNU General Public License as published by
- *    the Free Software Foundation, either version 3 of the License, or
- *    (at your option) any later version.
- *
- *    This program is distributed in the hope that it will be useful,
- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *    GNU General Public License for more details.
- *
- *    You should have received a copy of the GNU General Public License
- *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef CONCEPT_TOPOLOGICAL_DATA_WITH_SCALAR_PRODUCT_H_
-#define CONCEPT_TOPOLOGICAL_DATA_WITH_SCALAR_PRODUCT_H_
-
-namespace Gudhi {
-
-namespace Persistence_representations {
-
-/** \brief The concept Topological_data_with_scalar_product describes the requirements
-  * for a type to implement a container that allows computations of scalar products.
-  */
-class Topological_data_with_scalar_product {
- public:
-  double compute_scalar_product(const Topological_data_with_scalar_product& second);
-};
-
-}  // namespace Persistence_representations
-
-}  // namespace Gudhi
-
-#endif  // CONCEPT_TOPOLOGICAL_DATA_WITH_SCALAR_PRODUCT_H_