Update operators for v231

Author: anslpa

ansys/dpf/core/operators/averaging/nodal_extend_to_mid_nodes.py

@@ -1,6 +1,6 @@
 """
 nodal_extend_to_mid_nodes
-===============
+=========================
 Autogenerated DPF operator classes.
 """
 from warnings import warn

ansys/dpf/core/operators/geo/__init__.py

@@ -9,9 +9,5 @@
 from .elements_facets_surfaces_over_time import elements_facets_surfaces_over_time 
 from .elements_volume import elements_volume 
 from .element_nodal_contribution import element_nodal_contribution 
-from .center_of_gravity import center_of_gravity 
 from .integrate_over_elements import integrate_over_elements 
-from .mass import mass 
-from .moment_of_inertia import moment_of_inertia 
 from .normals import normals 
-from .prepare_mapping_workflow import prepare_mapping_workflow