JDK-8016019: Remove setProtectionDomain0 and JVM_SetProtectionDomain in JDK

[Eric McCorkle]

Hello,

Please review this simple patch that removes setProtectionDomain0 from
java.lang.Class.  This is part of a two-stage process to remove the
function from the JVM as well.

This method is not used, and has not been used in some time (at least
before 1.5)

The webrev is here:
http://cr.openjdk.java.net/~emc/8016019/

The change request ih here:
http://bugs.sun.com/view_bug.do?bug_id=8016019

Thanks,
Eric