refactor: 移除 DropFooterText 本地化

Author: ArgoZhang

src/BootstrapBlazor/Components/Upload/DropUpload.razor.cs

@@ -119,6 +119,5 @@ protected override void OnParametersSet()
 
         UploadIcon ??= IconTheme.GetIconByKey(ComponentIcons.DropUploadIcon);
         UploadText ??= Localizer["DropUploadText"];
-        FooterText ??= Localizer["DropFooterText"];
     }
 }

src/BootstrapBlazor/Locales/en.json

@@ -323,8 +323,7 @@
     "BrowserButtonText": "Browser",
     "FileExtensions": "File must have one of the following extensions: {0}",
     "FileSizeValidation": "File size must less than {0}",
-    "DropUploadText": "Drop files here or <em>click to upload</em>",
-    "DropFooterText": ""
+    "DropUploadText": "Drop files here or <em>click to upload</em>"
   },
   "BootstrapBlazor.Components.Handwritten": {
     "SaveButtonText": "Save",

src/BootstrapBlazor/Locales/zh.json

@@ -323,8 +323,7 @@
     "BrowserButtonText": "浏览",
     "FileExtensions": "文件扩展名必须为以下几种格式: {0}",
     "FileSizeValidation": "文件太大，文件限制大小为 {0}",
-    "DropUploadText": "拖拽文件到此处或者<em>点击上传</em>",
-    "DropFooterText": ""
+    "DropUploadText": "拖拽文件到此处或者<em>点击上传</em>"
   },
   "BootstrapBlazor.Components.Handwritten": {
     "SaveButtonText": "保存",