fix: remove unnecesary throw to fix #704

- Fix #704
- Thanks @lprone

DataStructures/Heaps/EmptyHeapException.java

@@ -1,16 +1,15 @@
 /**
- * 
+ *
  */
-package heaps;
+package Heaps;
 
 /**
  * @author Nicolas Renard
  * Exception to be thrown if the getElement method is used on an empty heap.
- *
  */
 @SuppressWarnings("serial")
 public class EmptyHeapException extends Exception {
-    
+
     public EmptyHeapException(String message) {
         super(message);
     }