Remove: Unnecessary @SuppressWarnings("unchecked").

src/main/java/org/apache/commons/collections4/FluentIterable.java

@@ -78,7 +78,6 @@ public class FluentIterable<E> implements Iterable<E> {
      * @param <T>  the element type
      * @return a new empty FluentIterable
      */
-    @SuppressWarnings("unchecked")
     public static <T> FluentIterable<T> empty() {
         return IterableUtils.EMPTY_ITERABLE;
     }