Update app.py

app.py

@@ -1,6 +1,5 @@
 import gradio as gr
-from interfaces import smiles2iupac, iupac2smiles, iupac2style, landing
-
+from interfaces import smiles2iupac, iupac2smiles, iupac2style
 
 demo = gr.TabbedInterface([smiles2iupac, iupac2smiles, iupac2style],
                           ["SMILES-to-IUPAC", "IUPAC-to-SMILES", "IUPAC style prediction"],