src/hotspot/share/runtime/thread.hpp

8224665: Parallel GC: Use WorkGang (7: remove task manager)

 class javaVFrame;
 
 class DeoptResourceMark;
 class jvmtiDeferredLocalVariableSet;
 
-class GCTaskQueue;
 class ThreadClosure;
 class ICRefillVerifier;
 class IdealGraphPrinter;
 
 class JVMCIEnv;

@@ -106,11 +105,10
 //     - NamedThread
 //       - VMThread
 //       - ConcurrentGCThread
 //       - WorkerThread
 //         - GangWorker
-//         - GCTaskThread
 //     - WatcherThread
 //     - JfrThreadSampler
 //
 // All Thread subclasses must be either JavaThread or NonJavaThread.
 // This means !t->is_Java_thread() iff t is a NonJavaThread, or t is