Thread-related classes are useless in VTK with C++11 support
Certain thread-related classes in VTK are now useless since we support C++11. We should deprecate them and remove their usages in VTK.
The classes are :
vtkMutexLock -> std::mutex
vtkCriticalSection -> std::mutex
vtkSimpleCriticalSection -> std::mutex
vtkMultiThreader -> std::thread (?)
vtkConditionVariable -> std::condition_variable
vtkAtomic -> std::atomic