Update app.py

app.py

@@ -11,7 +11,6 @@ st.markdown("Currently ChatBot is taking content only from this [file.](http://k
 
 class OpenAIClient:
     def __init__(self):
-        self.api_key = api_key
         self.client = openai.OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
         self.thread_id = None
         self.file_id = ["file-Anvyhz2k0puV0NCjWH8mGsuk"]