removed OPENAI_API_KEY from __init__

app.py

@@ -30,8 +30,7 @@ def add_text(history, text):
     return history
 
 class my_app:
-    def __init__(self, OPENAI_API_KEY: None ) -> None:
-        self.OPENAI_API_KEY = OPENAI_API_KEY
+    def __init__(self) -> None:
         self.chain = None
         self.chat_history = []
         self.N = 0