RFR (XS): 8008541 Remove old code in HotSpot that supported the jmap -permstat functionality

[Erik Helin]

Hi all,

this change is the third of three changes related to renaming the jmap
option permstat to clstats. The change has to be done as three separate
changes in order to not break any repositories:
1. Add support for the -clstats option to the SA agent
2. Change the tool jmap to use -clstats instead of -permstat
3. Remove the option -permstat from the SA agent

This CR represents the third step, which removes the support for the
option -permstats in the SA agent.

Step 1 and 2 are also out for review.

Webrev:
http://cr.openjdk.java.net/~ehelin/8008541/webrev.00/

Bug:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8008541

Thanks,
Erik