cleanup - explicit Object extending

h2/src/main/org/h2/mvstore/DataUtils.java

@@ -941,8 +941,7 @@ public final class DataUtils {
      * @return the parsed value
      * @throws IllegalStateException if parsing fails
      */
-    public static long readHexLong(Map<String, ? extends Object> map,
-            String key, long defaultValue) {
+    public static long readHexLong(Map<String, ?> map, String key, long defaultValue) {
         Object v = map.get(key);
         if (v == null) {
             return defaultValue;
@@ -1006,8 +1005,7 @@ public final class DataUtils {
      * @return the parsed value
      * @throws IllegalStateException if parsing fails
      */
-    public static int readHexInt(HashMap<String, ? extends Object> map,
-            String key, int defaultValue) {
+    public static int readHexInt(HashMap<String, ?> map, String key, int defaultValue) {
         Object v = map.get(key);
         if (v == null) {
             return defaultValue;

h2/src/main/org/h2/util/TempFileDeleter.java

@@ -90,7 +90,7 @@ public class TempFileDeleter {
      */
     public void deleteUnused() {
         while (queue != null) {
-            Reference<? extends Object> ref = queue.poll();
+            Reference<?> ref = queue.poll();
             if (ref == null) {
                 break;
             }