fix: remove unused imports and trailing blank line (lint fixes)

- Remove unused 'asyncio' import from both azure_openai_response_retry.py
- Remove unused 'Role' import from groupchat_orchestrator.py and middlewares.py
- Remove trailing blank line from ContentProcessor azure_openai_response_retry.py

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Prachig-Microsoft

src/ContentProcessor/src/libs/agent_framework/azure_openai_response_retry.py

@@ -11,7 +11,6 @@
 
 from __future__ import annotations
 
-import asyncio
 import logging
 import os
 import random
@@ -611,4 +610,3 @@ async def _inner_get_response(
                 ),
                 config=self._retry_config,
             )
-

src/ContentProcessorWorkflow/src/libs/agent_framework/azure_openai_response_retry.py

@@ -11,7 +11,6 @@
 
 from __future__ import annotations
 
-import asyncio
 import logging
 import os
 import random

src/ContentProcessorWorkflow/src/libs/agent_framework/groupchat_orchestrator.py

@@ -57,7 +57,6 @@
     ChatOptions,
     Executor,
     Message,
-    Role,
     SupportsAgentRun,
     Workflow,
     WorkflowEvent,

src/ContentProcessorWorkflow/src/libs/agent_framework/middlewares.py

@@ -40,7 +40,6 @@
     FunctionInvocationContext,
     FunctionMiddleware,
     Message,
-    Role,
 )
 
 logger = logging.getLogger(__name__)