Get rid of explicit SPICE unloading

src/bsk_rl/sim/world.py

@@ -203,14 +203,6 @@ def setup_ephem_object(self, priority: int = 988, **kwargs) -> None:
             self.world_task_name, self.ephemConverter, ModelPriority=priority
         )
 
-    def __del__(self) -> None:
-        """Log when world is deleted and unload SPICE."""
-        super().__del__()
-        try:
-            self.gravFactory.unloadSpiceKernels()
-        except AttributeError:
-            pass
-
 
 class EclipseWorldModel(WorldModel):
     def __init__(self, *args, **kwargs) -> None:

src/bsk_rl/utils/orbital.py

@@ -551,13 +551,6 @@ def r_BP_P(self) -> interp1d:
             fill_value="extrapolate",
         )
 
-    def __del__(self) -> None:
-        """Unload spice kernels when object is deleted."""
-        try:
-            self.gravFactory.unloadSpiceKernels()
-        except AttributeError:
-            pass
-
 
 def lla2ecef(lat: float, long: float, radius: float):
     """Project LLA to Earth Centered, Earth Fixed location.

tests/unittest/sim/test_world.py

@@ -77,10 +77,6 @@ def test_setup_and_delete(self, grav_set, epoch_set):
         world = WorldModel(MagicMock(), 1.0)
         for setter in (grav_set, epoch_set):
             setter.assert_called_once()
-        unload_function = MagicMock()
-        world.gravFactory = MagicMock(unloadSpiceKernels=unload_function)
-        del world
-        unload_function.assert_called_once()
 
     @patch(baseworld + "_setup_world_objects", MagicMock())
     @patch(module + "simIncludeGravBody", MagicMock())