Removed spurious @Override.

As the method simply implements an interface and as we are still
targeting Java 1.5, the @Override annotation should not be there.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1521774 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/math3/util/Combinations.java

@@ -129,7 +129,6 @@ public class Combinations implements Iterable<int[]> {
     }
 
     /** {@inheritDoc} */
-    @Override
     public Iterator<int[]> iterator() {
         if (k == 0 ||
             k == n) {