some more minor changes

app.py

@@ -171,21 +171,6 @@ def main(from_date,
             plt.title(title, fontdict=font1)
             return fig
 
-    # Define a function that gives the proportion of sentiments as a function of date
-    def sentiment_date(df, col_name, title):
-        if df.empty:
-            return None
-        else:
-            df = sentiment_date_input(df, col_name, LIMIT)
-            labels = df[col_name].to_list()
-            sizes = df['frequency'].values
-            # explode = (0, 0.1, 0, 0, 0)  # only "explode" the 2nd slice (i.e. 'Hogs')
-            font1 = {'family': 'serif', 'color': 'blue', 'size': 20}
-            fig = plt.figure()
-            plt.pie(sizes, labels=labels, radius=1, autopct='%1.1f%%')
-            plt.title(title, fontdict=font1)
-            return fig
-
     # text_classifier = tc.TextClassifier(from_date=from_date, to_date=to_date,
     #                                     user_list=match_name_lower_case(usr_name_choices),
     #                                     num_tweets=NUM_TWEETS)