diff --git a/idea.md b/idea.md
index 6224dfa..73f8e19 100644
--- a/idea.md
+++ b/idea.md
@@ -77,3 +77,4 @@ dam4.png ---- 存档 59
 [] 完全删除 functions.js
 [x] 优化插件加载系统
 [] 优化 Scroll 组件
+[] 重写技能控制系统
diff --git a/src/plugin/game/enemy/damage.ts b/src/plugin/game/enemy/damage.ts
index 2eafdc5..15e3c4e 100644
--- a/src/plugin/game/enemy/damage.ts
+++ b/src/plugin/game/enemy/damage.ts
@@ -1,14 +1,6 @@
 import { getHeroStatusOf, getHeroStatusOn } from '../hero';
 import { Range, RangeCollection } from '../range';
-import {
-    backDir,
-    checkV2,
-    ensureArray,
-    formatDamage,
-    has,
-    manhattan,
-    ofDir
-} from '../utils';
+import { checkV2, ensureArray, formatDamage, has, manhattan } from '../utils';
 
 interface HaloType {
     square: {