This configuration option was only added because Kokkos has such a flag.
But this flag is now deprecated in Kokkos and has no effect, so remove
it from VTK-m.
With the major revision 2.0 of VTK-m, many items previously marked as
deprecated were removed. If updating to a new version of VTK-m, it is
recommended to first update to VTK-m 1.9, which will include the deprecated
features but provide warnings (with the right compiler) that will point to
the replacement code. Once the deprecations have been fixed, updating to
2.0 should be smoother.
When you used the `AddHelp` option to `Initialize`, it added a
`--vtkm-help` option and `-h`, but not `--help`, which was weird. It
also avoided adding `--vtkm-help` when `AddHelp` was not used, but did
print out a usage statement under other circumstances.
This changes the behavior to add `--vtkm-help`, `--help`, and `-h` when
`AddHelp` is on and only `--vtkm-help` when it is off.
When a library requires reading some command line arguments through a
function like Initialize, it is typical that it will parse through
arguments it supports and then remove those arguments from argc and argv
so that the remaining arguments can be parsed by the calling program.
VTK-m's initialize did not do that, so add that functionality.
