RFR: 8234531: Remove CMS code from CLDG and safepoint cleanup

[Zhengyu Gu]

There are still some comments in classLoaderDataGraph.cpp referring CMS.

For example:

380  // (CMS doesn't purge right away).

Otherwise, looks good to me.

-Zhengyu

On 11/20/19 11:22 AM, erik.osterlund at oracle.com wrote:
> Hi,
> 
> There is some CMS code left in CLDG and safepoint cleanup. It should be 
> removed.
> 
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8234531
> 
> Webrev:
> http://cr.openjdk.java.net/~eosterlund/8234531/webrev.00/
> 
> Thanks,
> /Erik
>