Remove unused styles

src/directives/copy.ts

@@ -4,7 +4,7 @@
  * 接收参数：string类型/Ref<string>类型/Reactive<string>类型
  */
 import type { Directive, DirectiveBinding } from 'vue';
-import { useMessage } from 'naive-ui';
+
 interface ElType extends HTMLElement {
   copyData: string | number;
   __handleClick__: any;