Removed API_KEY validator

app.py

@@ -49,13 +49,10 @@ def infer(
 def respond(
     message,
     history,
-    api_key,
     max_tokens,
     temperature,
     top_p,
 ):
-    if api_key != getenv("API_KEY"):
-        raise ValueError("Invalid API Key")
     if len(history) == 0 or history[0]['role'] != 'system':
         messages = [{"role": "system", "content": """You are Softie, or 小软 in Chinese.
 You are an intelligent assistant developed by the School of Software at Hefei University of Technology.