Remove unused import

Author: garydgregory

src/test/java/org/apache/commons/lang3/stream/StreamsTest.java

@@ -28,7 +28,6 @@
 import java.lang.reflect.UndeclaredThrowableException;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Enumeration;
 import java.util.Hashtable;
 import java.util.Iterator;
 import java.util.List;