RFR (S) 8080298: Clean up os::...::supports_variable_stack_size()

[Coleen Phillimore]

Looks good!
Coleen

On 8/3/15 1:51 AM, David Holmes wrote:
> Bug: https://bugs.openjdk.java.net/browse/JDK-8080298
>
> webrev: http://cr.openjdk.java.net/~dholmes/8080298/webrev/
>
> To support the old LinuxThreads implementation we had to distinguish 
> between threading libraries with fixed-stack-size threads 
> (LinuxThreads), and variable-stack-sized-threads (NPTL). As 
> LinuxThreads support was removed years ago and all the code related to 
> it has now been removed, we have a situation where 
> supports_variable_stack_size() is always true and so the function and 
> its use can be removed.
>
> While this notion was only ever relevant to Linux it also got copied 
> across to the BSD and AIX ports.
>
> Thanks,
> David