refactor: enforce mandatory config_class and name attributes in RLAlgorithm

src/lerobot/rl/algorithms/base.py

@@ -32,15 +32,8 @@ if TYPE_CHECKING:
 class RLAlgorithm(abc.ABC):
     """Base for all RL algorithms."""
 
-    config_class: type[RLAlgorithmConfig] | None = None
-    name: str | None = None
-
-    def __init_subclass__(cls, **kwargs):
-        super().__init_subclass__(**kwargs)
-        if not getattr(cls, "config_class", None):
-            raise TypeError(f"Class {cls.__name__} must define 'config_class'")
-        if not getattr(cls, "name", None):
-            raise TypeError(f"Class {cls.__name__} must define 'name'")
+    config_class: type[RLAlgorithmConfig]
+    name: str
 
     @abc.abstractmethod
     def update(self, batch_iterator: Iterator[BatchType]) -> TrainingStats: