Remove GPL comments from Athena codebase

src/Athena/SkywardSwordFileWriter.cpp

@@ -1,19 +1,3 @@
-#if !defined(ATHENA_NO_SAVES) && !defined(ATHENA_NO_ZQUEST)
-// This file is part of libAthena.
-//
-// libAthena 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.
-//
-// libAthena 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 libAthena.  If not, see <http://www.gnu.org/licenses/>
-
 #include "Athena/SkywardSwordFileWriter.hpp"
 #include "Athena/SkywardSwordFile.hpp"
 #include "Athena/SkywardSwordQuest.hpp"
@@ -80,4 +64,3 @@ void SkywardSwordFileWriter::write(SkywardSwordFile* file)
 
 } // io
 } // zelda
-#endif // ATHENA_NO_SAVES