Between Blender versions, properties of some operators may be removed.
When this happens, when importing the keymap from the previous version,
a series of warnings may appear in the console. For example:
```
Warning: property 'alt_navigation' not found in item 'TRANSFORM_OT_translate'
Warning: property 'alt_navigation' not found in item 'TRANSFORM_OT_rotate'
Warning: property 'alt_navigation' not found in item 'TRANSFORM_OT_resize'
Warning: property 'alt_navigation' not found in item 'VIEW3D_OT_edit_mesh_extrude_move_normal'
...
```
Therefore, it seems to be convenient to edit these properties when
versioning.
This commit implements a `remove_properties` utility that makes this
removal simpler.
Pull Request: https://projects.blender.org/blender/blender/pulls/114936
14c2f6856a