Make objective classes slotted

CHANGELOG.md

@@ -32,7 +32,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   parameter configurations
 - Simulation no longer fails for targets in `MATCH` mode
 - `closest_element` now works for array-like input of all kinds
-- Parameter classes are now slotted due to `cached_property` attrs support
+- Parameter and objective classes are now slotted due to `cached_property` attrs support
 
 ### Deprecations
 - The former `baybe.objective.Objective` class has been replaced with

baybe/objectives/base.py

@@ -14,11 +14,8 @@
 from baybe.serialization.mixin import SerialMixin
 from baybe.targets.base import Target
 
-# TODO: Reactive slots in all classes once cached_property is supported:
-#   https://github.com/python-attrs/attrs/issues/164
 
-
-@define(frozen=True, slots=False)
+@define(frozen=True)
 class Objective(ABC, SerialMixin):
     """Abstract base class for all objectives."""
 

baybe/objectives/desirability.py

@@ -60,7 +60,7 @@ def scalarize(
     return func(values, weights=weights)
 
 
-@define(frozen=True, slots=False)
+@define(frozen=True)
 class DesirabilityObjective(Objective):
     """An objective scalarizing multiple targets using desirability values."""