diff --git a/src/battle-scene.ts b/src/battle-scene.ts
index 533740f89c0..e4222bc549e 100644
--- a/src/battle-scene.ts
+++ b/src/battle-scene.ts
@@ -19,12 +19,7 @@ import {
   type Constructor,
 } from "#app/utils/common";
 import { deepMergeSpriteData } from "#app/utils/data";
-import type {
-  Modifier,
-  ModifierIdentityPredicate,
-  ModifierPredicate,
-  TurnHeldItemTransferModifier,
-} from "./modifier/modifier";
+import type { Modifier, ModifierPredicate, TurnHeldItemTransferModifier } from "./modifier/modifier";
 import {
   ConsumableModifier,
   ConsumablePokemonModifier,
@@ -3411,11 +3406,6 @@ export default class BattleScene extends SceneBase {
     return (isPlayer ? this.modifiers : this.enemyModifiers).filter(modifierFilter);
   }
 
-  findModifier<T extends PersistentModifier>(
-    modifierFilter: ModifierIdentityPredicate<T>,
-    player?: boolean,
-  ): T | undefined;
-  findModifier(modifierFilter: ModifierPredicate, player?: boolean): PersistentModifier | undefined;
   /**
    * Find the first modifier that pass the `modifierFilter` function
    * @param modifierFilter The function used to filter a target's modifiers
diff --git a/src/modifier/modifier.ts b/src/modifier/modifier.ts
index 3fe17c47f30..4f4b5dd5d41 100644
--- a/src/modifier/modifier.ts
+++ b/src/modifier/modifier.ts
@@ -56,7 +56,6 @@ import {
 import { globalScene } from "#app/global-scene";
 
 export type ModifierPredicate = (modifier: Modifier) => boolean;
-export type ModifierIdentityPredicate<T extends Modifier> = (modifier: Modifier) => modifier is T;
 
 const iconOverflowIndex = 24;