fix: 代码优化

package.json

 {
   "name": "panda-xform",
-  "version": "5.6.4",
-  "description": "5.6.4 无预览图片时增加通用图片",
+  "version": "5.6.5",
+  "description": "5.6.5 代码优化",
   "keywords": [
     "panda-xform"
   ],

src/core/widgets/file/FileUpload/index.js

@@ -66,8 +66,7 @@ const FileUpload = (props) => {
 
   const site = window.globalConfig?.userInfo?.site || window.globalConfig?.userInfo?.LocalSite
   const { addons, value, schema, onChange } = props
-  const { disabled, fileType, placeholder, preview, download } = schema
-  const presetValue = 'be489bc1-db3f-4d24-8d81-79910c99b7cb/业务系统菜单配置说明.pdf'
+  const { disabled, fileType, presetValue, placeholder, preview, download } = schema
 
   const [imgVisible, setImgVisible] = useState(false)
   const [showList, setShowList] = useState([])