Should work?

app.py

@@ -16,7 +16,7 @@ import matplotlib.pyplot as plt
 import matplotlib.dates as mdates
 
 # Machine Learning
-import scikit-learn as sklearn
+import sklearn
 
 # Print version info
 print("Version info:")
@@ -156,8 +156,5 @@ def makeprediction():
     return fig
 
 
-def greet(name):
-    return "Hello " + name + "!!"
-
 iface = gr.Interface(fn=makeprediction, inputs=None, outputs=gr.Plot())
 iface.launch()