Request for review 8001471: Klass::cast() does nothing now

[harold seigel]

Please review the following change to fix bug 8001471.

Summary: The bug was fixed by removing the unneeded Klass::cast() 
operations.  All of the casts() were unneeded because they were casting 
either objects of type 'Klass *', function results of type 'Klass *', or 
function results that were subtypes of 'Klass *'.

Open webrev at http://cr.openjdk.java.net/~hseigel/bug_8001471/ 
<http://cr.openjdk.java.net/%7Ehseigel/bug_8001471/>

Bug link at http://bugs.sun.com/view_bug.do?bug_id=800147

The changes were tested with JPRT, JCK, JTREG, and ute tests.

Thanks, Harold