--- jsr166/src/test/jtreg/util/PriorityQueue/NoNulls.java	2010/05/09 07:41:12	1.1
+++ jsr166/src/test/jtreg/util/PriorityQueue/NoNulls.java	2017/01/04 04:46:19	1.7
@@ -1,7 +1,7 @@
 /*
  * Written by Martin Buchholz with assistance from members of JCP JSR-166
  * Expert Group and released to the public domain, as explained at
- * http://creativecommons.org/licenses/publicdomain
+ * http://creativecommons.org/publicdomain/zero/1.0/
  */
 
 /*
@@ -11,10 +11,8 @@
  */
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Comparator;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.PriorityQueue;
 import java.util.SortedSet;
 import java.util.TreeSet;