simpfg: remove this unused function

* src/tl/simpfg.cc, src/tl/simpfg.hh: Delete.
* src/tl/Makefile.am: Adjust.

src/tl/Makefile.am

@@ -39,7 +39,6 @@ tl_HEADERS =					\
   randomltl.hh					\
   relabel.hh					\
   remove_x.hh					\
-  simpfg.hh					\
   simplify.hh					\
   snf.hh					\
   unabbrev.hh
@@ -62,7 +61,6 @@ libtl_la_SOURCES =				\
   randomltl.cc					\
   relabel.cc					\
   remove_x.cc					\
-  simpfg.cc					\
   simplify.cc					\
   snf.cc					\
   unabbrev.cc

src/tl/simpfg.cc

-// -*- coding: utf-8 -*-
-// Copyright (C) 2010, 2012, 2014, 2015 Laboratoire de Recherche et
-// Développement de l'Epita (LRDE).
-// Copyright (C) 2004  Laboratoire d'Informatique de Paris 6 (LIP6),
-// département Systèmes Répartis Coopératifs (SRC), Université Pierre
-// et Marie Curie.
-//
-// This file is part of Spot, a model checking library.
-//
-// Spot 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.
-//
-// Spot 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/>.
-
-#include "simpfg.hh"
-
-namespace spot
-{
-  formula simplify_f_g(formula p)
-  {
-    // 1 U p = Fp
-    if (p.is(op::U) && p[0].is_tt())
-      return formula::F(p[1]);
-    // 0 R p = Gp
-    if (p.is(op::R) && p[0].is_ff())
-      return formula::G(p[1]);
-    // p W 0 = Gp
-    if (p.is(op::W) && p[1].is_ff())
-      return formula::G(p[0]);
-    // p M 1 = Fp
-    if (p.is(op::M) && p[1].is_tt())
-      return formula::F(p[0]);
-    return p.map(simplify_f_g);
-  }
-}

src/tl/simpfg.hh

-// -*- coding: utf-8 -*-
-// Copyright (C) 2010, 2012, 2013, 2015 Laboratoire de Recherche et
-// Développement de l'Epita (LRDE).
-// Copyright (C) 2004  Laboratoire d'Informatique de Paris 6 (LIP6),
-// département Systèmes Répartis Coopératifs (SRC), Université Pierre
-// et Marie Curie.
-//
-// This file is part of Spot, a model checking library.
-//
-// Spot 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.
-//
-// Spot 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/>.
-
-#pragma once
-
-#include "formula.hh"
-
-namespace spot
-{
-  /// \ingroup tl_rewriting
-  /// \brief Replace <code>true U f</code> and <code>false R g</code> by
-  /// <code>F f</code> and <code>G g</code>.
-  ///
-  /// Perform the following rewriting (from left to right):
-  ///
-  /// - true U a = F a
-  /// - a M true = F a
-  /// - false R a = G a
-  /// - a W false = G a
-  ///
-  SPOT_API formula simplify_f_g(formula f);
-}