Update handler.py

handler.py

@@ -46,17 +46,13 @@ MARKDOWN_SEPARATORS = [
 
 class EndpointHandler():
 
-    def __init__(self, path=""):
-        # Config LangChain
-        os.environ["LANGCHAIN_TRACING_V2"] = "true"
-        os.environ["LANGCHAIN_API_KEY"] = "ls__9834e6b2ff094d43a28418c9ecea2fd5"
-        
+    def __init__(self, path=""): 
         # Load Vector db
         urls = [
             "https://scholars.cityu.edu.hk/en/persons/man-hon-michael-cheung(0f913a96-a28d-47ea-848c-f444804c16f2).html",
             "https://scholars.cityu.edu.hk/en/persons/man-hon-michael-cheung(0f913a96-a28d-47ea-848c-f444804c16f2)/publications.html",
             "https://www.cityu.edu.hk/media/press-release/2022/05/17/cityu-council-announces-appointment-professor-freddy-boey-next-president",
-            "https://www.cityu.edu.hk/media/press-release/2023/05/18/professor-freddy-boey-installed-5th-president-cityu",
+            "https://www.cityu.edu.hk/media/press-release/2023/05/18/professor-freddy-boey-installed-5th-president-cityu"
         ]
         
         loader = WebBaseLoader(urls)