vtkmodules.util.vtkConstants is obsolete

the deprecation note mentiones the base vtk module, but importing that
is not advisable due to issues with non-existent optional modules.

Author: MarDiehl

python/damask/_vtk.py

@@ -30,6 +30,10 @@
     vtkRectilinearGrid,
     vtkUnstructuredGrid,
     vtkPolyData,
+    VTK_TRIANGLE,
+    VTK_QUAD,
+    VTK_TETRA,
+    VTK_HEXAHEDRON,
 )
 from vtkmodules.vtkIOLegacy import (
     vtkGenericDataObjectReader,
@@ -56,12 +60,6 @@
 from vtkmodules.vtkRenderingAnnotation import (
     vtkScalarBarActor,
 )
-from vtkmodules.util.vtkConstants import (
-    VTK_TRIANGLE,
-    VTK_QUAD,
-    VTK_TETRA,
-    VTK_HEXAHEDRON,
-)
 from vtkmodules.util.numpy_support import (
     numpy_to_vtk,
     numpy_to_vtkIdTypeArray,