Delete useless *.cc files in ltlast/

src/ltlast/formula.cc

@@ -1,74 +0,0 @@
-// Copyright (C) 2003, 2005  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 2 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 Spot; see the file COPYING.  If not, write to the Free
-// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-// 02111-1307, USA.
-
-#include "formula.hh"
-#include "misc/hash.hh"
-
-namespace spot
-{
-  namespace ltl
-  {
-    formula*
-    formula::ref()
-    {
-      ref_();
-      return this;
-    }
-
-    formula::~formula()
-    {
-    }
-
-    void
-    formula::unref(formula* f)
-    {
-      if (f->unref_())
-	delete f;
-    }
-
-    void
-    formula::ref_()
-    {
-      // Not reference counted by default.
-    }
-
-    bool
-    formula::unref_()
-    {
-      // Not reference counted by default.
-      return false;
-    }
-
-    const std::string&
-    formula::dump() const
-    {
-      return dump_;
-    }
-
-    void
-    formula::set_key_()
-    {
-      string_hash sh;
-      hash_key_ = sh(dump_);
-    }
-
-  }
-}