Adapt to changes in Gerrit core

Change-Id: I993eae92e96b768b3ddab4f4add208caac03af44
diff --git a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java
index 0aa2a42..b2e2127 100644
--- a/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java
+++ b/java/com/google/gerrit/plugins/codeowners/backend/CodeOwnerApprovalCheck.java
@@ -945,13 +945,7 @@
   private ImmutableList<PatchSetApproval> getCurrentPatchSetApprovals(ChangeNotes changeNotes) {
     try (Timer0.Context ctx = codeOwnerMetrics.computePatchSetApprovals.start()) {
       return ImmutableList.copyOf(
-          approvalsUtil.byPatchSet(
-              changeNotes,
-              changeNotes.getCurrentPatchSet().id(),
-              /** revWalk */
-              null,
-              /** repoConfig */
-              null));
+          approvalsUtil.byPatchSet(changeNotes, changeNotes.getCurrentPatchSet().id()));
     }
   }