remove trailing whitespace

src/main/java/de/thm/arsnova/entities/Session.java

@@ -25,7 +25,7 @@ import com.fasterxml.jackson.annotation.JsonIgnore;
 public class Session implements Serializable {
 
 	private static final long serialVersionUID = 1L;
-
+	
 	private String type;
 	private String name;
 	private String shortName;