remove cmdstanr line printing blurb

sessions/forecast-visualisation.qmd

@@ -44,12 +44,9 @@ The best way to interact with the material is via the [Visual Editor](https://do
 
 We set a random seed for reproducibility. 
 Setting this ensures that you should get exactly the same results on your computer as we do.
-We also set an option that makes `cmdstanr` show line numbers when printing model code.
-This is not strictly necessary but will help us talk about the models.
 
 ```{r}
 set.seed(123)
-options(cmdstanr_print_line_numbers = TRUE)
 ```
 
 :::