Pufferfish sting: drop the end-of-tick arm apply_brain_events now replaces

Every PufferfishSting comes from a mob's tick (sting_touching_mobs), and
apply_brain_events consumes it right after that tick, so handle_mob_events'
mob_hits_mob arm could no longer run. It joins StartFollowing and SchoolSize.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

crates/horizon-client/src/game/creatures.rs

@@ -2396,34 +2396,6 @@ impl Game<'_> {
                         }
                     }
                 }
-                MobEvent::PufferfishSting {
-                    mob,
-                    target,
-                    amount,
-                    source,
-                    poison_ticks,
-                } => {
-                    // Pufferfish.touch: the poison and
-                    // `playSound(PUFFER_FISH_STING, 1, 1)` sit inside the
-                    // `hurtServer` branch, so only a hit that landed poisons
-                    // and stings, at the fish's own position as
-                    // `Entity.playSound` puts it, and not when it is silent.
-                    let landed = self.mob_hits_mob(target, amount, source);
-                    if landed && let Some(t) = self.mobs.iter_mut().find(|m| m.id == target) {
-                        t.add_effect("minecraft:poison", poison_ticks, 0);
-                    }
-                    if landed && let Some(m) = self.mobs.iter_mut().find(|m| m.id == mob) {
-                        let at = [m.position.x, m.position.y, m.position.z];
-                        if !m.silent {
-                            self.handle_mob_events(vec![MobEvent::Sound(
-                                "entity.puffer_fish.sting",
-                                at,
-                                1.0,
-                                1.0,
-                            )])?;
-                        }
-                    }
-                }
                 MobEvent::SonicBoom {
                     target,
                     attacker,
@@ -3001,7 +2973,9 @@ impl Game<'_> {
                     }
                 }
                 // Applied after the fish's tick (`apply_brain_events`).
-                MobEvent::StartFollowing { .. } | MobEvent::SchoolSize { .. } => {}
+                MobEvent::StartFollowing { .. }
+                | MobEvent::SchoolSize { .. }
+                | MobEvent::PufferfishSting { .. } => {}
                 MobEvent::LeashBreak { mob, drop, sound } => self.break_leash(mob, drop, sound),
                 MobEvent::NotifyLeashHolder { holder } => {
                     if let Some(m) = self.mobs.iter_mut().find(|m| m.id == holder) {