Refactor map

src/trigger_system.rs

@@ -37,7 +37,7 @@ impl<'a> System<'a> for TriggerSystem {
             inflicts_damage,
             mut particle_builder,
             mut inflict_damage,
-            mut single_activation,
+            single_activation,
         ) = data;
 
         let mut remove_entities: Vec<Entity> = Vec::new();