Review request for JDK-8139304: Remove some obsolete Dynalink classes

[Attila Szegedi]

Please review JDK-8139304 "Remove some obsolete Dynalink classes" at 
<http://cr.openjdk.java.net/~attila/8139304/webrev.jdk9-01> for 
<https://bugs.openjdk.java.net/browse/JDK-8139304>

Thanks,
  Attila.