Remove references to ApprovalCategory

This was removed in Gerrit in
I5df6f0c5665d0ae4ee6b5e2944f5954fa2f96b5c.

Change-Id: Ied2c508dc827e4e11ac5858a1c2c84ce3ba07f4a

src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java
index 69457a9..8546bf0 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java
@@ -38,7 +38,6 @@
 
 import com.google.gerrit.common.data.LabelType;
 import com.google.gerrit.common.data.LabelTypes;
-import com.google.gerrit.reviewdb.client.ApprovalCategory;
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.PatchSetApproval;
@@ -219,10 +218,10 @@
     for (PatchSetApproval a : approvals) {
       if (a.getValue() == 0) {
         // Ignore 0 values.
-      } else if (ApprovalCategory.SUBMIT.equals(a.getCategoryId())) {
+      } else if (a.isSubmit()) {
         submit = a;
       } else {
-        LabelType type = labelTypes.byId(a.getCategoryId().get());
+        LabelType type = labelTypes.byLabel(a.getLabelId());
         if (type != null) {
           fmt.appendApproval(type, a.getValue(),
               accountCache.get(a.getAccountId()).getAccount());