Update app.py

app.py

@@ -107,8 +107,7 @@ def set_DRlink(dr_link: str):
     print("DR Link set")    
     #chat_history = []
     #history = []
-        
-    #dr_link_url = 'https://repository.lib.cuhk.edu.hk/en/islandora/object/cuhk%3A'+ dr_link + '/datastream/PDF/'   
+       
     dr_link_url = dr_link_url1 + dr_link + dr_link_url2
     #app.DR_LINK = dr_link        
     hdr = { 'User-Agent' : user_agent }