remove unused class

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

@@ -1,60 +0,0 @@
-/*
- * Licensed to ElasticSearch and Shay Banon 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.index.IndexWriter;
-import org.apache.lucene.index.SegmentInfos;
-import org.elasticsearch.common.logging.ESLogger;
-import org.elasticsearch.common.logging.Loggers;
-
-import java.lang.reflect.Field;
-
-/**
- *
- */
-public abstract class IndexWriters {
-
-    private static ESLogger logger = Loggers.getLogger(IndexWriters.class);
-
-    private static Field rollbackSegmentInfosField;
-
-    private static final boolean docWriterReflection;
-
-    static {
-        boolean docWriterReflectionX = false;
-        try {
-            rollbackSegmentInfosField = IndexWriter.class.getDeclaredField("rollbackSegmentInfos");
-            rollbackSegmentInfosField.setAccessible(true);
-
-            docWriterReflectionX = true;
-        } catch (Exception e) {
-            logger.warn("Failed to doc writer fields", e);
-        }
-        docWriterReflection = docWriterReflectionX;
-    }
-
-    public static SegmentInfos rollbackSegmentInfos(IndexWriter writer) throws Exception {
-        return (SegmentInfos) rollbackSegmentInfosField.get(writer);
-    }
-
-    private IndexWriters() {
-
-    }
-}