making sure we don't check for agents that were not used in the crew

src/crewai/crew.py

@@ -445,6 +445,7 @@ class Crew(BaseModel):
         training_data = CrewTrainingHandler(TRAINING_DATA_FILE).load()
 
         for agent in train_crew.agents:
+            if training_data.get(str(agent.id)):
                 result = TaskEvaluator(agent).evaluate_training_data(
                     training_data=training_data, agent_id=str(agent.id)
                 )