RFR[XS] 8171809 - Remove unused CDS code from JDK9

[Ioi Lam]

Hi,

Please review this very simple change:

https://bugs.openjdk.java.net/browse/JDK-8171809
http://cr.openjdk.java.net/~iklam/jdk9/8171809-remove-unused-cds-code.v01/

The following code related to CDS:

+ the handling of ClassLoaderData::_shared_class_loader_id
+ SystemDictionaryShared::serailzie

is no longer needed in JDK9. Thus, it should be removed from the JDK9 repo.


Thanks
- Ioi