diff --git a/src/theme/index.ts b/src/theme/index.ts
deleted file mode 100644
index 61890a7..0000000
--- a/src/theme/index.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-import { addClass, hasClass, removeClass } from '@/utils/domUtils'
-
-/**
- * html 根标签上挂载 暗/亮 属性标识
- */
-export function updateDarkSign(mode: 'light' | 'dark') {
-  const htmlRoot = document.getElementById('htmlRoot')
-  if (!htmlRoot) {
-    return
-  }
-  const hasDarkClass = hasClass(htmlRoot, 'dark')
-
-  if (mode === 'dark') {
-    htmlRoot.setAttribute('data-theme', 'dark')
-    if (!hasDarkClass) {
-      addClass(htmlRoot, 'dark')
-    }
-  }
-  else {
-    htmlRoot.setAttribute('data-theme', 'light')
-    if (hasDarkClass) {
-      removeClass(htmlRoot, 'dark')
-    }
-  }
-}