remove duplicate license info

src/main/java/alfio/util/TemplateManager.java

@@ -14,22 +14,6 @@
  * You should have received a copy of the GNU General Public License
  * along with alf.io.  If not, see <http://www.gnu.org/licenses/>.
  */
-/**
- * This file is part of alf.io.
- * <p>
- * alf.io 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.
- * <p>
- * alf.io 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.
- * <p>
- * You should have received a copy of the GNU General Public License
- * along with alf.io.  If not, see <http://www.gnu.org/licenses/>.
- */
 package alfio.util;
 
 import alfio.config.WebSecurityConfig;