remove dead code

src/main/java/org/elasticsearch/common/lucene/Directories.java

@@ -1,54 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-package org.elasticsearch.common.lucene;
-
-import org.apache.lucene.store.Directory;
-
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.nio.file.NoSuchFileException;
-
-/**
- * A set of utilities for Lucene {@link Directory}.
- *
- *
- */
-public class Directories {
-
-    /**
-     * Returns the estimated size of a {@link Directory}.
-     */
-    public static long estimateSize(Directory directory) throws IOException {
-        long estimatedSize = 0;
-        String[] files = directory.listAll();
-        for (String file : files) {
-            try {
-                estimatedSize += directory.fileLength(file);
-            } catch (NoSuchFileException | FileNotFoundException e) {
-                // ignore, the file is not there no more
-            }
-        }
-        return estimatedSize;
-    }
-
-    private Directories() {
-
-    }
-}