RFR (S) 8228630: Remove always true parameter to NoSafepointVerifier

[Kim Barrett]

> On Jul 30, 2019, at 5:33 PM, coleen.phillimore at oracle.com wrote:
> 
> 
> I fixed the comment in thread.hpp above the _allow_safepoint_count and renamed the field to _no_safepoint_count, which makes a lot more sense.  Retesting.
> 
> open webrev at http://cr.openjdk.java.net/~coleenp/2019/8228630.02/webrev

Thanks for renaming the member and updating the comment as we discussed.

Looks good.

> 
> Thanks,
> Coleen
> 
> On 7/30/19 4:45 PM, coleen.phillimore at oracle.com wrote:
>> Summary: Also remove NoGCVerifier since NoSafepointVerifier covers GC checking when not already at a safepoint and is a stronger check.
>> 
>> See bug for more details also.  Tested with all jtreg runtime,compiler,serviceability and gc tests.  Also hs-tier1-3 on linux-x64-debug.
>> 
>> open webrev at http://cr.openjdk.java.net/~coleenp/2019/8228630.01/webrev
>> bug link https://bugs.openjdk.java.net/browse/JDK-8228630
>> 
>> Thanks,
>> Coleen