Removes useless call in JUnit test
diff --git a/org.eclipse.virgo.util.common/src/test/java/org/eclipse/virgo/util/common/ThreadSafeArrayListTreeTests.java b/org.eclipse.virgo.util.common/src/test/java/org/eclipse/virgo/util/common/ThreadSafeArrayListTreeTests.java
index dbd1794..adbae86 100644
--- a/org.eclipse.virgo.util.common/src/test/java/org/eclipse/virgo/util/common/ThreadSafeArrayListTreeTests.java
+++ b/org.eclipse.virgo.util.common/src/test/java/org/eclipse/virgo/util/common/ThreadSafeArrayListTreeTests.java
@@ -98,7 +98,6 @@
 
         {
             Tree<String> a = new ThreadSafeArrayListTree<String>(null);
-            a.hashCode();
             assertFalse(this.top.equals(a));
             assertFalse(a.equals(this.top));
         }