Update app.py

app.py

@@ -40,7 +40,7 @@ def plot(alpha):
     X = (X - mean) / std
 
     clf = SGDClassifier(alpha=alpha, max_iter=100).fit(X, y)
-    ax = plt.gca()
+    #ax = plt.gca()
     DecisionBoundaryDisplay.from_estimator(
         clf,
         X,