Remove unused functions

popcorn.py

@@ -5,9 +5,7 @@ app = marimo.App(width="medium")
 
 with app.setup:
     # Initialization code that runs beimpofore all other cells
-    import json
     import re
-    from pathlib import Path
 
     import lets_plot as lp
     import marimo as mo
@@ -141,7 +139,6 @@ def _(df: pl.DataFrame):
         lp.ggplot(weekly_downloads, lp.aes("date", "downloads"))
         + lp.geom_line()
         + lp.geom_smooth(method="loess")
-        + lp.geom_smooth(method="lm")
         + lp.labs(
             title="Weekly downloads",
         )