RFR: JDK-8143255: Remove debug logging from SymbolTable::unlink() and SymbolTable::possibly_parallel_unlink()

[Bengt Rutisson]

Hi everyone,

Could I have a couple of reviews for this patch to remove some debugging 
code?

http://cr.openjdk.java.net/~brutisso/8143255/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8143255

 From the bug report:

The logging inside SymbolTable::unlink() and 
SymbolTable::possibly_parallel_unlink() is guarded by Verbose and 
WizardMode, which are both develop flags. This means that the log output 
is not available in product builds. So, this logging is most likely just 
leftover debugging code.

In the GC team we don't use this logging (even though it is for some 
reason guarded by PrintGCDetails too) and I discussed it with Coleen and 
Rachel in the Runtime team. The Runtime team also don't use the logging.

It is pretty straight forward to add this logging back if it is ever 
needed for a debugging session. Until then we should remove this from 
the code base.

Thanks,
Bengt