--- old/src/java.net.http/share/classes/jdk/internal/net/http/common/HttpHeadersImpl.java	2018-05-25 15:52:26.292560749 +0100
+++ /dev/null	2018-04-23 10:23:09.668448234 +0100
@@ -1,89 +0,0 @@
-/*
- * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package jdk.internal.net.http.common;
-
-import java.net.http.HttpHeaders;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-import java.util.TreeMap;
-
-/**
- * Implementation of HttpHeaders.
- *
- * The public HttpHeaders API provides a read-only view, while the
- * non-HttpHeaders members allow for implementation specific mutation, e.g.
- * during creation, etc.
- */
-public class HttpHeadersImpl extends HttpHeaders {
-
-    private final TreeMap<String, List<String>> headers;
-
-    public HttpHeadersImpl() {
-        headers = new TreeMap<>(String.CASE_INSENSITIVE_ORDER);
-    }
-
-    @Override
-    public Map<String, List<String>> map() {
-        return Collections.unmodifiableMap(headersMap());
-    }
-
-    // non-HttpHeaders private mutators
-
-    public HttpHeadersImpl deepCopy() {
-        HttpHeadersImpl h1 = newDeepCopy();
-        for (Map.Entry<String, List<String>> entry : headersMap().entrySet()) {
-            List<String> valuesCopy = new ArrayList<>(entry.getValue());
-            h1.headersMap().put(entry.getKey(), valuesCopy);
-        }
-        return h1;
-    }
-
-    public void addHeader(String name, String value) {
-        headersMap().computeIfAbsent(name, k -> new ArrayList<>(1))
-                    .add(value);
-    }
-
-    public void setHeader(String name, String value) {
-        // headers typically have one value
-        List<String> values = new ArrayList<>(1);
-        values.add(value);
-        headersMap().put(name, values);
-    }
-
-    public void clear() {
-        headersMap().clear();
-    }
-
-    protected HttpHeadersImpl newDeepCopy() {
-        return new HttpHeadersImpl();
-    }
-
-    protected Map<String, List<String>> headersMap() {
-        return headers;
-    }
-}