Remove OpenAI API call reference from chat_with_data_plugin.py file

Author: NirajC-Microsoft

src/App/backend/plugins/chat_with_data_plugin.py

@@ -1,7 +1,6 @@
 import logging
 from typing import Annotated
 
-import openai
 from azure.ai.agents.models import (
     Agent,
     AzureAISearchQueryType,
@@ -223,17 +222,6 @@ async def get_answers_from_calltranscripts(
             logging.error(f"Error in get_answers_from_calltranscripts: {str(e)}")
             return "Error retrieving data from call transcripts"
 
-    def get_openai_client(self):
-        token_provider = get_bearer_token_provider(
-            get_azure_credential(config.MID_ID), "https://cognitiveservices.azure.com/.default"
-        )
-        openai_client = openai.AzureOpenAI(
-            azure_endpoint=config.AZURE_OPENAI_ENDPOINT,
-            azure_ad_token_provider=token_provider,
-            api_version=config.AZURE_OPENAI_PREVIEW_API_VERSION,
-        )
-        return openai_client
-
     def get_project_openai_client(self):
         project = AIProjectClient(
             endpoint=config.AI_PROJECT_ENDPOINT, credential=get_azure_credential(config.MID_ID)