--- a/src/java.base/share/classes/sun/security/ssl/UnknownExtension.java	Mon Jun 25 21:22:16 2018 +0300
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,60 +0,0 @@
-/*
- * Copyright (c) 2006, 2012, 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 sun.security.ssl;
-
-import java.io.IOException;
-
-final class UnknownExtension extends HelloExtension {
-
-    private final byte[] data;
-
-    UnknownExtension(HandshakeInStream s, int len, ExtensionType type)
-            throws IOException {
-        super(type);
-        data = new byte[len];
-        // s.read() does not handle 0-length arrays.
-        if (len != 0) {
-            s.read(data);
-        }
-    }
-
-    @Override
-    int length() {
-        return 4 + data.length;
-    }
-
-    @Override
-    void send(HandshakeOutStream s) throws IOException {
-        s.putInt16(type.id);
-        s.putBytes16(data);
-    }
-
-    @Override
-    public String toString() {
-        return "Unsupported extension " + type + ", data: " +
-            Debug.toString(data);
-    }
-}