diff --git a/vignettes/Parabolic.Rmd b/vignettes/Parabolic.Rmd
index f9ac6f0..3c9eda3 100644
--- a/vignettes/Parabolic.Rmd
+++ b/vignettes/Parabolic.Rmd
@@ -126,24 +126,3 @@ pde$solve()
 fig <- contour(f)
 #fig
 ```
-
-```{r}
-df <- data.frame(
-  x = c(1,2,1), 
-  y = c(1,2,1), 
-  f = c(1,2,3)
-)
-
-fig <- df %>%
-  plot_ly(
-    x = ~x,
-    y = ~y,
-    frame = ~f,
-    type = 'scatter',
-    mode = 'markers',
-    showlegend = F
-  )
-
-fig
-```
-