diff --git a/block-storage/src/main/java/org/lucares/pdb/map/NodeEntry.java b/block-storage/src/main/java/org/lucares/pdb/map/NodeEntry.java
index 0ce98b2..4a0b366 100644
--- a/block-storage/src/main/java/org/lucares/pdb/map/NodeEntry.java
+++ b/block-storage/src/main/java/org/lucares/pdb/map/NodeEntry.java
@@ -3,7 +3,6 @@ package org.lucares.pdb.map;
 import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.Comparator;
 import java.util.function.Function;
 import java.util.function.Predicate;
 
@@ -47,10 +46,6 @@ class NodeEntry {
 		}
 	}
 
-	// TODO remove?
-	@Deprecated
-	public static final Comparator<NodeEntry> SORT_BY_KEY = (a, b) -> a.compare(b.getKey());
-
 	private final ValueType type;
 	private final byte[] key;
 	private final byte[] value;
diff --git a/data-store/src/main/java/org/lucares/pdb/datastore/internal/TagsUtils.java b/data-store/src/main/java/org/lucares/pdb/datastore/internal/TagsUtils.java
deleted file mode 100644
index 56b2487..0000000
--- a/data-store/src/main/java/org/lucares/pdb/datastore/internal/TagsUtils.java
+++ /dev/null
@@ -1,5 +0,0 @@
-package org.lucares.pdb.datastore.internal;
-
-public class TagsUtils {
-
-}