deleted arena allocator for the tree

src/main.rs

@@ -201,7 +201,7 @@ pub async fn roll(ctx: &Context, command: &CommandInteraction) -> anyhow::Result
     }
     for _ in 0..repeat {
         text_components.push(CreateContainerComponent::TextDisplay(
-            CreateTextDisplay::new(format!("{}\n", expression.evaluate(&mut rng)?)),
+            CreateTextDisplay::new(format!("{}\n", expression.collect_evaluation(&mut rng)?)),
         ));
     }
     if fixed_seed.is_some() {