RFR: 8232211: Remove dead code from os.hpp|cpp

[Claes Redestad]

Hi,

Robbin pointed out a few additional things that seemed to be unused,
including an unused createThread_lock Mutex and that _os_version is
never read, which means initialize_os_info can go - too.

New webrev: http://cr.openjdk.java.net/~redestad/8232211/open.01/
Incremental: http://cr.openjdk.java.net/~redestad/8232211/open.00_01.inc/

Testing: I'll get some done...

Thanks!

/Claes

On 2019-10-15 14:28, Claes Redestad wrote:
> Hi,
> 
> feel free to review this patch which simply removes a number of
> dead and/or effectively unused methods from our os interface
> 
> Webrev: http://cr.openjdk.java.net/~redestad/8232211/open.00/
> Bug:    https://bugs.openjdk.java.net/browse/JDK-8232211
> 
> Testing: tier1-2,5 (includes minimal VM builds)
> 
> Thanks!
> 
> /Claes