OpenRepo: Remove unused constants

Change-Id: Ia4c6f06a66e1f21aa6a99e2ff3ea6139b4399029
diff --git a/java/com/google/gerrit/server/notedb/OpenRepo.java b/java/com/google/gerrit/server/notedb/OpenRepo.java
index a60309a..351f31d 100644
--- a/java/com/google/gerrit/server/notedb/OpenRepo.java
+++ b/java/com/google/gerrit/server/notedb/OpenRepo.java
@@ -43,9 +43,6 @@
  * objects that are jointly closed when invoking {@link #close}.
  */
 class OpenRepo implements AutoCloseable {
-  private static final Integer UNLIMITED_UPDATES = null;
-  private static final Integer UNLIMITED_PATCH_SETS = null;
-
   final Repository repo;
   final RevWalk rw;
   final ChainedReceiveCommands cmds;