Remove reference to NoteDb being enabled

NoteDb is always enabled: so we remove the comment.

Change-Id: I2078882bdf9181f117b025f9dfb5f0fd217737e9
diff --git a/java/com/google/gerrit/server/CommentsUtil.java b/java/com/google/gerrit/server/CommentsUtil.java
index b18f499..ba9f6d6 100644
--- a/java/com/google/gerrit/server/CommentsUtil.java
+++ b/java/com/google/gerrit/server/CommentsUtil.java
@@ -450,8 +450,6 @@
   /**
    * Get NoteDb draft refs for a change.
    *
-   * <p>Works if NoteDb is not enabled, but the results are not meaningful.
-   *
    * <p>This is just a simple ref scan, so the results may potentially include refs for zombie draft
    * comments. A zombie draft is one which has been published but the write to delete the draft ref
    * from All-Users failed.