fallback no longer needed
@@ -334,14 +334,7 @@ class GeometryChangeTracker:
self._unary_unions = {}
def _get_unary_union(self, level_id):
-
- try:
union = self._unary_unions.get(level_id)
- except AttributeError:
- # fallback if there are still old pickled updates in the queue
- self._unary_unions = {}
- union = None
-
if union is None:
union = unary_union(self._geometries_by_level[level_id])
self._unary_unions[level_id] = union
