hg: jdk/submit: 8215043: Remove declaration of parallel_worker_threads

[jcbeyler at google.com]

Changeset: d4bff3bb84c6
Author:    jcbeyler
Date:      2018-12-07 21:16 -0800
URL:       http://hg.openjdk.java.net/jdk/submit/rev/d4bff3bb84c6

8215043: Remove declaration of parallel_worker_threads
Summary:
Reviewed-by:

! src/hotspot/share/runtime/vm_version.hpp