[cleanup] Remove deprecated CakeGridCreator

dumux/io/grid/CMakeLists.txt

 install(FILES
-cakegridcreator.hh
 cakegridmanager.hh
 cpgridmanager.hh
 gmshgriddatahandle.hh

dumux/io/grid/cakegridcreator.hh

-// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
-// vi: set et ts=4 sw=4 sts=4:
-/*****************************************************************************
- *   See the file COPYING for full copying permissions.                      *
- *                                                                           *
- *   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/>.   *
- *****************************************************************************/
-/*!
- * \file
- * \ingroup InputOutput
- * \brief Provides a grid creator for a piece of cake grid
- */
-#ifndef DUMUX_CAKE_GRID_CREATOR_HH
-#define DUMUX_CAKE_GRID_CREATOR_HH
-
-#warning "This header is deprecated. Use the new cakegridmanager."
-
-#include "cakegridmanager.hh"
-
-namespace Dumux {
-
-/*!
- * \ingroup InputOutput
- * \brief Provides a grid creator with a method for creating creating vectors
- *        with polar Coordinates and one for creating a cartesian grid from
- *        these polar coordinates.
- */
-template<class Grid>
-using CakeGridCreator [[deprecated("Use CakeGridManager instead!")]] = CakeGridManager<Grid>;
-} // end namespace Dumux
-
-#endif