fix: remove_physics_callback called with extra argument

[andrewwhitecdw]

This PR addresses the following issue in exts/omni.ext.mobility_gen/omni/ext/mobility_gen/extension.py: remove_physics_callback called with extra argument.

Changes

• exts/omni.ext.mobility_gen/omni/ext/mobility_gen/extension.py: remove_physics_callback called with extra argument.

Details

Before:

        world = get_world()
        world.remove_physics_callback("scenario_physics", self.on_physics)

After:

        world = get_world()
        if world is not None:
            try:
                world.remove_physics_callback("scenario_physics")
            except Exception:
                pass