Convert xps files to SPDX license headers

generators/xps/generator_xps.cpp

@@ -1,20 +1,7 @@
 /*
     SPDX-FileCopyrightText: 2006, 2009 Brad Hards <bradh@frogmouth.net>
 
-    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 2
-    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, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-    02110-1301, USA.
+    SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "generator_xps.h"

generators/xps/generator_xps.h

@@ -1,20 +1,7 @@
 /*
     SPDX-FileCopyrightText: 2006 Brad Hards <bradh@frogmouth.net>
 
-    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 2
-    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, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-    02110-1301, USA.
+    SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #ifndef _OKULAR_GENERATOR_XPS_H_