fix api issue

app.py

@@ -16,13 +16,10 @@ from langchain_groq import ChatGroq
 from langchain.memory import ConversationBufferMemory
 
 
-# 🔹 Load Groq API Key
 def load_groq_api_key():
-    dotenv_path = "groq.env"
-    load_dotenv(dotenv_path)
-    groq_api_key = os.getenv("GROQ_API_KEY")
+    groq_api_key = os.getenv("GROQ_API_KEY") 
     if not groq_api_key:
-        raise ValueError(f"Unable to retrieve GROQ_API_KEY from {dotenv_path}")
+        raise ValueError("Error: GROQ_API_KEY not found in environment variables.")
     return groq_api_key