refactored toString Method of class TournamentFile

app/src/main/java/ch/zhaw/projekt2/turnierverwaltung/FileIO.java

@@ -136,8 +136,7 @@ public class FileIO {
         }
 
         public String toString(){
-            String name = getName();
-            return name.split("\\.")[0];
+            return getName().split("\\.")[0];
         }
 
     }