Clean up remaining AsyncAzureOpenAI imports

Co-authored-by: pamelafox <[email protected]>

Author: Copilot

app/backend/prepdocs.py

@@ -9,7 +9,7 @@
 from azure.core.credentials import AzureKeyCredential
 from azure.core.credentials_async import AsyncTokenCredential
 from azure.identity.aio import AzureDeveloperCliCredential, get_bearer_token_provider
-from openai import AsyncAzureOpenAI, AsyncOpenAI
+from openai import AsyncOpenAI
 from rich.logging import RichHandler
 
 from load_azd_env import load_azd_env

app/backend/prepdocslib/embeddings.py

@@ -9,7 +9,7 @@
 from azure.core.credentials import AzureKeyCredential
 from azure.core.credentials_async import AsyncTokenCredential
 from azure.identity.aio import get_bearer_token_provider
-from openai import AsyncAzureOpenAI, AsyncOpenAI, RateLimitError
+from openai import AsyncOpenAI, RateLimitError
 from tenacity import (
     AsyncRetrying,
     retry_if_exception_type,