DOC: The array produced by the filter is SelectedPoints.

The documentation states that the name of the output vtkDataArray is "SelectedPointsArray". In fact the array name is "SelectedPoints".

The implementation does initially set the array name to SelectedPointsArray, but later resets it to SelectedPoints.

This MR corrects the documentaion and also removes the extraneous call to hits->SetName("SelectedPointsArray");