Clean up unused imports and event-related code

- Remove unused imports from various event and flow-related files
- Reorder event imports to follow standard conventions
- Remove unnecessary event type references
- Simplify import statements in event and flow modules

src/crewai/flow/flow.py

@@ -17,7 +17,6 @@ from typing import (
 )
 from uuid import uuid4
 
-from blinker import Signal
 from pydantic import BaseModel, Field, ValidationError
 
 from crewai.flow.flow_visualizer import plot_flow
@@ -25,11 +24,11 @@ from crewai.flow.persistence.base import FlowPersistence
 from crewai.flow.utils import get_possible_return_constants
 from crewai.telemetry import Telemetry
 from crewai.utilities.events import (
+    FlowCreatedEvent,
     FlowFinishedEvent,
     FlowStartedEvent,
     MethodExecutionFinishedEvent,
     MethodExecutionStartedEvent,
-    FlowCreatedEvent,
 )
 from crewai.utilities.events.event_bus import event_bus
 from crewai.utilities.printer import Printer

src/crewai/utilities/events/__init__.py

@@ -22,7 +22,7 @@ from .flow_events import (
     MethodExecutionStartedEvent,
     MethodExecutionFinishedEvent,
 )
-from .event_bus import EventTypes, EventBus, event_bus
+from .event_bus import EventBus, event_bus
 from .tool_usage_events import ToolUsageFinishedEvent, ToolUsageErrorEvent
 
 # events

src/crewai/utilities/events/event_bus.py

@@ -6,8 +6,6 @@ from blinker import Signal
 
 from crewai.utilities.events.crew_events import CrewEvent
 
-from .event_types import EventTypes
-
 EventT = TypeVar("EventT", bound=CrewEvent)
 
 

src/crewai/utilities/events/task_events.py

@@ -1,4 +1,5 @@
 from typing import Any, Optional
+
 from crewai.utilities.events.crew_events import CrewEvent
 
 

tests/crew_test.py

@@ -6,7 +6,6 @@ from concurrent.futures import Future
 from unittest import mock
 from unittest.mock import MagicMock, patch
 
-import instructor
 import pydantic_core
 import pytest
 
@@ -17,24 +16,23 @@ from crewai.crews.crew_output import CrewOutput
 from crewai.knowledge.source.string_knowledge_source import StringKnowledgeSource
 from crewai.memory.contextual.contextual_memory import ContextualMemory
 from crewai.process import Process
-from crewai.project import crew
 from crewai.task import Task
 from crewai.tasks.conditional_task import ConditionalTask
 from crewai.tasks.output_format import OutputFormat
 from crewai.tasks.task_output import TaskOutput
 from crewai.types.usage_metrics import UsageMetrics
 from crewai.utilities import Logger
+from crewai.utilities.events import (
+    CrewTrainCompletedEvent,
+    CrewTrainStartedEvent,
+    event_bus,
+)
 from crewai.utilities.events.crew_events import (
     CrewTestCompletedEvent,
     CrewTestStartedEvent,
 )
 from crewai.utilities.rpm_controller import RPMController
 from crewai.utilities.task_output_storage_handler import TaskOutputStorageHandler
-from crewai.utilities.events import (
-    CrewTrainStartedEvent,
-    CrewTrainCompletedEvent,
-    event_bus,
-)
 
 ceo = Agent(
     role="CEO",

tests/utilities/test_events.py

@@ -34,7 +34,6 @@ from crewai.utilities.events.task_events import (
     TaskStartedEvent,
 )
 from crewai.utilities.events.tool_usage_events import ToolUsageErrorEvent
-from requests.exceptions import RequestException
 
 base_agent = Agent(
     role="base_agent",