--- a/jdk/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java	Thu May 04 16:38:09 2017 +0000
+++ b/jdk/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java	Fri May 05 04:52:02 2017 +0000
@@ -43,7 +43,6 @@
 import java.util.Comparator;
 import java.util.Iterator;
 import java.util.Map;
-import java.util.NavigableMap;
 import java.util.NavigableSet;
 import java.util.Set;
 import java.util.SortedSet;