Code cleaning

Author: sergioburdisso

src/sdialog/agents.py

@@ -282,7 +282,10 @@ def tokenizer(self):
             pass
         return None
 
-    def __call__(self, utterance: Union[str, List[BaseMessage]] = "", return_events: bool = False, current_dialog: Dialog = None) -> str:
+    def __call__(self,
+                 utterance: Union[str, List[BaseMessage]] = "",
+                 return_events: bool = False,
+                 current_dialog: Dialog = None) -> str:
         """
         Processes an input utterance and generates a response.
 

src/sdialog/orchestrators/base.py

@@ -9,7 +9,6 @@
 
 from typing import List
 from abc import ABC, abstractmethod
-from langchain_core.messages import SystemMessage, AIMessage
 
 from .. import Turn
 from ..util import make_serializable