vtkCoreGraphicsGPUInfoList was based on Apple's QA1168 docs,
which were rather dated and used API recently deprecated.
QA1168 was recently updated, and so I've changed
vtkCoreGraphicsGPUInfoList per its current recommendations.

This has the added benefit of using only the OpenGL framework,
and so I've removed everything that was checking for IOKit
and ApplicationServices, since they are no longer needed by VTK
at all.

Change-Id: I79b032b843b331f40d79d0f2072923253c464e05