chore(lint): remove BaseConfig ABC

zenconfig/base.py

@@ -56,7 +56,7 @@ def to_dict(self, config: Any, encoder: Encoder) -> Dict[str, Any]:
         """Dump the config to dict."""
 
 
-class BaseConfig(ABC):
+class BaseConfig:
     """Abstract base class for handling config files."""
 
     # Environment variable name holding the config file path to load.