MP-11740 Remove unused constant

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: sarveswaran-m

src/test/java/com/trivago/fastutilconcurrentwrapper/longshort/AbstractLongShortTreeMapTest.java

@@ -13,7 +13,6 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 abstract class AbstractLongShortTreeMapTest extends AbstractMapTest {
-    private static final short FASTUTIL_DEFAULT_VALUE = 0;
     protected short defaultValue;
     private LongShortTreeMap map;