RFR (T) 8225628: Remove unused Thread::muxAcquireW function

[coleen.phillimore at oracle.com]

Thanks Dan and Harold.
Coleen

On 9/20/19 10:30 AM, Harold Seigel wrote:
> Looks good, and trivial.
>
> Harold
>
> On 9/20/2019 10:21 AM, coleen.phillimore at oracle.com wrote:
>> I didn't find any historical use of this function.  It looks like a 
>> copy of muxAcquire where a different ParkEvent could be passed in or 
>> allocated for the park operation.
>>
>> open webrev at 
>> http://cr.openjdk.java.net/~coleenp/2019/8225628.01/webrev
>> bug link https://bugs.openjdk.java.net/browse/JDK-8225628
>>
>> Ran tier1 testing on all Oracle platforms.
>>
>> Thanks,
>> Coleen
>>