diff --git a/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/data/IndexMetaInfoCategory.java b/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/data/IndexMetaInfoCategory.java
deleted file mode 100644
index 0a4742a2d..000000000
--- a/skywalking-storage-center/skywalking-storage/src/main/java/com/a/eye/skywalking/storage/data/IndexMetaInfoCategory.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package com.a.eye.skywalking.storage.data;
-
-import com.a.eye.skywalking.storage.block.index.BlockFinder;
-import com.a.eye.skywalking.storage.data.index.IndexMetaInfo;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-public class IndexMetaInfoCategory {
-
-    public static Map<Long, List<IndexMetaInfo>> categorizeByDataIndexTime(List<IndexMetaInfo> indexMetaInfo,
-            BlockFinder finder) {
-        Map<Long, List<IndexMetaInfo>> categorizeMetaInfo = new HashMap<Long, List<IndexMetaInfo>>();
-
-        for (IndexMetaInfo info : indexMetaInfo) {
-            long timestamp = finder.find(info.getStartTime());
-
-            List<IndexMetaInfo> metaInfos = categorizeMetaInfo.get(timestamp);
-            if (metaInfos == null) {
-                metaInfos.add(info);
-                categorizeMetaInfo.put(timestamp, metaInfos);
-            }
-        }
-
-        return categorizeMetaInfo;
-    }
-}