RFR: 8241585: Remove unused _recursion_counter facility from PerfTraceTime

[Claes Redestad]

On 2020-03-27 03:18, David Holmes wrote:
> 
> Yeah they confuse me. Which makes it hard to see what impact your 
> changes may have.

This patch removes some internal, unused code on the JVM end that is not
observable via jstat / jvmstat. I'm happy if serviceability can weigh in
though.

The other RFE[1] I've filed to remove StatSampler[1] might be more
contentious since it changes what gets periodically stored in the
perfdata shared file. I've not yet decided if it's worth the trouble to
move ahead with that at this point.

/Claes

[1] https://bugs.openjdk.java.net/browse/JDK-8241701