Update Eval Run and TrajectoryEvaluator to use the new schema.

PiperOrigin-RevId: 758927160

src/google/adk/evaluation/agent_evaluator.py

@@ -258,13 +258,6 @@ class AgentEvaluator:
         initial_session=initial_session,
     )
 
-  @staticmethod
-  def _generate_responses_from_session(eval_dataset, session_path):
-    """Generates evaluation responses by running the agent module multiple times."""
-    return EvaluationGenerator.generate_responses_from_session(
-        session_path, eval_dataset
-    )
-
   @staticmethod
   def _response_evaluation_required(criteria, eval_dataset):
     """Checks if response evaluation are needed."""