refactor: streamline AgentExecutor initialization by removing redundant parameters

Updated the Agent class to simplify the initialization of the AgentExecutor by removing unnecessary task and crew parameters in standalone mode. This change enhances code clarity and maintains backward compatibility by ensuring that the executor is correctly configured without redundant assignments.

lib/crewai/src/crewai/agent/core.py

@@ -1642,6 +1642,8 @@ class Agent(BaseAgent):
 
         # Create the executor for standalone mode (no crew, no task)
         executor = AgentExecutor(
+            task=None,
+            crew=None,
             llm=cast(BaseLLM, self.llm),
             agent=self,
             prompt=prompt,
@@ -1651,8 +1653,6 @@ class Agent(BaseAgent):
             stop_words=stop_words,
             tools_description=render_text_description_and_args(parsed_tools),
             tools_handler=self.tools_handler,
-            task=None,  # Standalone mode
-            crew=None,  # Standalone mode
             original_tools=raw_tools,
             step_callback=self.step_callback,
             function_calling_llm=self.function_calling_llm,
@@ -1663,7 +1663,6 @@ class Agent(BaseAgent):
             i18n=self.i18n,
         )
 
-        # Format messages for the executor
         if isinstance(messages, str):
             formatted_messages = messages
         else:
@@ -1693,7 +1692,6 @@ class Agent(BaseAgent):
             # Execute and build output
             output = self._execute_and_build_output(executor, inputs, response_format)
 
-            # Process guardrail if configured
             if self.guardrail is not None:
                 output = self._process_kickoff_guardrail(
                     output=output,
@@ -1702,7 +1700,6 @@ class Agent(BaseAgent):
                     response_format=response_format,
                 )
 
-            # Emit completed event for backward compatibility with LiteAgent listeners
             crewai_event_bus.emit(
                 self,
                 event=LiteAgentExecutionCompletedEvent(
@@ -1714,7 +1711,6 @@ class Agent(BaseAgent):
             return output
 
         except Exception as e:
-            # Emit error event for backward compatibility with LiteAgent listeners
             crewai_event_bus.emit(
                 self,
                 event=LiteAgentExecutionErrorEvent(